| | Date | System | Genre | Unreleased |
|---|
| .Hack Infection Part 1 (Jan 9, 2004 prototype) | 9 January 2004 18:01:59 | PlayStation 2 | Role-playing | - |
| 007: Legends (Aug 7, 2012 prototype) | 7 August 2012 | Xbox 360 | FPS | - |
| 007: Legends (Jun 18, 2012 prototype) | 18 June 2012 | Xbox 360 | FPS | - |
| 007: Legends (Nov 13, 2012 prototype) | 13 November 2012 | Xbox 360 | FPS | - |
| 007: The World Is Not Enough (Aug 26, 2000 prototype) | 26 August 2000 | PlayStation | First-person shooter, stealth | - |
| 007: The World is Not Enough (Prototype - 2020 release) | | Nintendo 64 | First-person shooter, stealth | - |
| 007: The World is Not Enough (Prototype) | | Nintendo 64 | FPS | - |
| 100 Bullets (Apr 22, 2004 prototype) | 22 April 2004 | Xbox | Action | ✓ |
| 100 Bullets (Aug 6, 2004 prototype) | 6 August 2004 | Xbox | Action | ✓ |
| 100 Bullets (Jun 30, 2004 prototype) | 30 June 2004 | PlayStation 2 | Action | ✓ |
| 101 Dalmatians (Aug 14, 1996 prototype) | 14 August 1996 06:07:02 | Sega Pico | Educational | - |
| 101 Dalmatians (Aug 16, 1996 prototype) | 16 August 1996 05:19:20 | Sega Pico | Educational | - |
| 101 Dalmatians (Aug 17, 1996 prototype B) | 17 August 1996 06:47:28 | Sega Pico | Educational | - |
| 101 Dalmatians (Aug 17, 1996 prototype J) | 16 August 1996 20:56:56 | Sega Pico | Educational | - |
| 101 Dalmatians (Aug 17, 1996 prototype U) | 16 August 1996 18:59:48 | Sega Pico | Educational | - |
| 101 Dalmatians (Jul 18, 1996 prototype) | 18 July 1996 12:31:08 | Sega Pico | Educational | - |
| 101 Dalmatians (Jul 3, 1996 prototype) | 3 July 1996 11:22:50 | Sega Pico | Educational | - |
| 101 Dalmatians (Jul 5, 1996 prototype) | 7 July 1996 13:11:32 | Sega Pico | Educational | - |
| 101 Dalmatians (May 21, 1996 prototype) | 21 May 1996 17:26:14 | Sega Pico | Educational | - |
| 101 Dalmatians (May 31, 1996 prototype) | 31 May 1996 08:51:22 | Sega Pico | Educational | - |
| 102 Dalmatians: Puppies to the Rescue (prototype) | | Dreamcast | Platform | - |
| 18 Wheeler: American Pro Trucker (Apr 5, 2001 prototype) | 5 April 2001 22:04:22 | Dreamcast | Racing | - |
| 18 Wheeler: American Pro Trucker (Feb 2, 2001 prototype) | 2 February 2001 04:11:28 | Dreamcast | Racing | - |
| 1943: The Battle of Midway (Prototype) | | NES | Shooter | - |
| 2 in 1: Dora the Explorer Double Pack (Prototype) | | Game Boy Advance | Compilation | - |
| 2420 ROM Pack V | | Game Boy | Test cartridge | - |
| 2440 ROM Pack | | Game Boy | Test cartridge | - |
| 24: The Game (Jan 10, 2006 prototype) | 10 January 2006 | PlayStation 2 | Third-person shooter | - |
| 24: The Game (Nov 28, 2005 prototype) | 28 November 2005 10:18:41 | PlayStation 2 | Third-person shooter | - |
| 25 to Life (Dec 8, 2005 prototype) | 8 December 2005 | Xbox | Third-person shooter | - |
| 3 Jigen Kakutou Ballz (Prototype) | | SNES | Puzzle | - |
| 3D Gunner (Prototype) | | Sega Master System | Shooter | ✓ |
| 3D Pinball: Space Cadet (Apr 26, 1995 prototype) | 26 April 1995 18:49:55 | PC | Pinball | - |
| 3D Pinball: Space Cadet (July 3, 1995 prototype) | 3 July 1995 05:30:00 | PC | Pinball | - |
| 3D Pinball: Space Cadet (June 12, 1995 prototype) | 12 June 1995 23:02:24 | PC | Pinball | - |
| 3D Pinball: Space Cadet (June 16, 1995 prototype) | 16 June 1995 20:41:19 | PC | Pinball | - |
| 3D Pinball: Space Cadet (June 27, 1995 prototype) | 27 June 1995 17:19:44 | PC | Pinball | - |
| 3D Pinball: Space Cadet (May 12, 1995 prototype) | 12 May 1995 16:36:21 | PC | Pinball | - |
| 3D Pinball: Space Cadet (May 26, 1995 prototype) | 26 May 1995 17:33:35 | PC | Pinball | - |
| 3DO M2 Shooter Demo | | Panasonic M2 | Tech Demo | - |
| 40 Winks (Oct 7, 1999 prototype) | 7 October 1999 11:30:42 | Nintendo 64 | Platform | ✓ |
| 4x4 Evolution (Jan 9, 2001 prototype) | 9 January 2001 11:47:12 | Dreamcast | Racing | ✓ |
| 500 Years After (Mar 1, 1993 prototype) | 1 March 1993 | Philips CD-i | FMV | ✓ |
| 64DD IPL (US Prototype) | | | Development | - |
| 64DD IPL Disk (v1.0) | | | Development | - |
| 64DD IPL Disk (v1.1) | | | Development | - |
| 64DD TOOL IPL (Development Drive) | | | Development | - |
| 7 Sins (Sep 29, 2004 prototype) | 29 September 2009 | PlayStation 2 | Life simulation game | - |
| 90 Minutes: Sega Championship Football (Sep 18, 2001 prototype) | 18 September 2001 | Dreamcast | Sports - Football | - |
| A Night in Nylon City (Oct 28, 1994 prototype) | 28 October 1994 | Philips CD-i | FMV | - |
| A Week of Garfield (prototype) | | NES | Platformer | - |
| A-Max Boxing (prototype) | | Nintendo DS | Sports | ✓ |
| A-Max Tennis (prototype) | | Nintendo DS | Sports | ✓ |
| AGING-NTR (prototype) | 18 August 2004 | Nintendo DS | Diagnostic | ✓ |
| AH-64D Apache (Mar 26, 2003 prototype) | 26 March 2003 15:11:27 | PlayStation 2 | Action | - |
| ATP Tour Championship Tennis (Aug 2, 1994 prototype) | 2 August 1994 16:39:48 | Sega Mega Drive | Sports - Tennis | - |
| ATP Tour Championship Tennis (Aug 5, 1994 prototype) | 5 August 1994 05:22:18 | Sega Mega Drive | Sports - Tennis | - |
| ATP Tour Championship Tennis (Aug 8, 1994 prototype) | 8 August 1994 15:44:46 | Sega Mega Drive | Sports - Tennis | - |
| ATP Tour Championship Tennis (Jul 19, 1994 prototype) | 19 July 1994 05:43:00 | Sega Mega Drive | Sports - Tennis | - |
| ATP Tour Championship Tennis (Jul 23, 1994 prototype) | 25 July 1994 12:02:30 | Sega Mega Drive | Sports - Tennis | - |
| ATP Tour Championship Tennis (May 9, 1994 prototype) | 26 May 1994 21:33:22 | Sega Mega Drive | Sports - Tennis | - |
| ATP Tour Championship Tennis (Sep 19, 1994 prototype) | 19 September 1994 05:53:12 | Sega Mega Drive | Sports - Tennis | - |
| ATP Tour Championship Tennis (Sep 8, 1994 prototype) | 14 September 1994 06:10:28 | Sega Mega Drive | Sports - Tennis | - |
| ATV Offroad Fury 3 (Aug 22, 2004 prototype) | 22 August 2004 | PlayStation 2 | Racing | - |
| ATV Offroad Fury 3 (Aug 6, 2004 prototype) | 6 August 2004 15:03:14 | PlayStation 2 | Racing | - |
| ATV Offroad Fury 3 (Jul 23, 2004 prototype) | 23 July 2004 21:01:15 | PlayStation 2 | Racing | - |
| ATV Offroad Fury 3 (Jun 8, 2004 prototype) | 8 June 2004 13:10:10 | PlayStation 2 | Racing | - |
| ATV Offroad Fury 3 (Nov 8, 2004 prototype) | 8 November 2004 11:47:45 | PlayStation 2 | Racing | - |
| ATV Offroad Fury 3 (Nov 9, 2004 prototype) | 9 November 2004 13:37:38 | PlayStation 2 | Racing | - |
| ATV Offroad Fury 3 (Oct 13, 2004 prototype) | 13 October 2004 20:11:01 | PlayStation 2 | Racing | - |
| ATV Offroad Fury 4 (Oct 2, 2006 prototype) | 2 October 2006 | PlayStation 2 | | - |
| ATV Offroad Fury Pro (Sep 25, 2006 prototype) | 25 September 2006 | PlayStation Portable | | - |
| ATV3: Lawless (May 7, 2005 prototype) | 7 May 2005 | Xbox | Racing | ✓ |
| ATV: Quad Power Racing (Jul 4, 2000 prototype) | 4 July 2000 18:29:56 | PlayStation | Racing | - |
| ATV: Quad Power Racing 2 (Nov 6, 2002 prototype) | | PlayStation 2 | Racing | - |
| ATV: Quad Power Racing 2 (Oct 11, 2002 prototype) | 11 October 2002 18:01:57 | Nintendo GameCube | Racing | - |
| Aaahh!!! Real Monsters (Jul 7, 1995 prototype) | 7 July 1995 | Sega Mega Drive | Adventure | - |
| Ace Combat 04: Shattered Skies (Nov 14, 2001 prototype) | 15 November 2001 14:33:44 | PlayStation 2 | Combat flight simulator | - |
| Ace Combat X: Skies of Deception (Aug 1, 2006 prototype) | 1 August 2006 19:01:55 | PlayStation Portable | Shooting | - |
| Ace Combat X: Skies of Deception (Aug 16, 2006 prototype) | 16 August 2006 23:27:31 | PlayStation Portable | Flight Combat | - |
| Acolyte (Prototype) | | Amstrad CPC | Action | ✓ |
| Action Fighter (Prototype) | | Sega Master System | Action | - |
| Advance Wars (prototype) | | Game Boy Advance | Strategy | - |
| Advanced Daisenryaku - Deutsch Dengeki Sakusen (Mar 7, 1991 prototype) | 7 March 1991 17:35:20 | Sega Mega Drive | Strategy | - |
| Adventure Island III (Prototype) | | NES | Action | ✓ |
| Adventure Time: The Secret of the Nameless Kingdom (Oct 28, 2014 prototype) | 28 October 2014 | | | - |
| Adventures in the Magic Kingdom (Early prototype) | | NES | Action | - |
| Adventures in the Magic Kingdom (Prototype) | | NES | Action | - |
| Aeon Flux (Jun 27, 2005 prototype) | 27 June 2005 | PlayStation 2 | Action-adventure | - |
| Aeon Flux (Nov 18, 1996 prototype) | 18 November 1996 | PlayStation | Action | ✓ |
| Aero the Acro-Bat (Game Boy Advance) (Prototype) | | Game Boy Advance | Action | - |
| Aero the Acro-Bat (PAL prototype) | | Sega Mega Drive | Platform | - |
| Aero the Acro-Bat 2 (Aug 8, 1994 prototype) | 8 August 1994 | SNES | Action | - |
| AeroGauge (Japanese demo) | | Nintendo 64 | Racing | - |
| Agaju: The Sacred Path of Treasure (Prototype) | | Gizmondo | Adventure | ✓ |
| Agartha (Apr 18, 2001 prototype) | 18 April 2001 00:23:42 | Dreamcast | Survival Horror | ✓ |
| Agartha (Mar 5, 2001 prototype) | 5 March 2001 16:34:14 | Dreamcast | Survival Horror | ✓ |
| Aidyn Chronicles: The First Mage (Feb 1, 2001 Debug) | January 2001 | Nintendo 64 | Role-playing Game | - |
| Aidyn Chronicles: The First Mage (Feb 10, 2000 prototype) | 10 February 2000 13:21:13 | Nintendo 64 | Role playing | - |
| Aidyn Chronicles: The First Mage (May 9, 2000 prototype) | 9 May 2000 07:45:51 | Nintendo 64 | Role playing | - |
| Air Fortress (Prototype) | | FDS | Shooter | ✓ |
| AirCars (Nov 14, 1994 prototype) | 14 November 1994 | Atari Jaguar | Action | - |
| Airblade (Sep 16, 2001 prototype) | 16 September 2001 18:49:31 | PlayStation 2 | Sports | - |
| Akira (Prototype) | | Sega Mega Drive | Action | ✓ |
| Akuu Senki Raijin (Oct 14, 1987 prototype) | 14 October 1987 | FDS | Shoot 'Em Up | - |
| Aladdin (Chicago C.E.S demo) | 27 June 1993 | Sega Mega Drive | Platform | - |
| Aladdin (Dec 28, 1993 prototype) | 29 December 1993 11:11:18 | Game Gear | Action Platformer | - |
| Aladdin (Jan 11, 1994 prototype) | 9 January 1994 19:35:30 | Game Gear | Action Platformer | - |
| Aladdin (Jan 13, 1994 prototype) | 13 January 1994 18:05:22 | Game Gear | Action Platformer | - |
| Aladdin (Jan 24, 1994 prototype) | 24 January 1994 19:34:02 | Game Gear | Action Platformer | - |
| Aladdin (Jul 31, 1993 prototype) | 31 July 1993 17:46:24 | Sega Mega Drive | Platformer | - |
| Alex Kidd: High-Tech World (Prototype) | | Sega Master System | Action | - |
| Alfred Chicken (Dec 3, 2001 prototype) | 3 December 2001 | PlayStation | Platform | - |
| Alfred Chicken (ECTS Show 1993 Prototype) | | PC | Platform | - |
| Alien Front (Nov 27, 2004 prototype) | 27 November 2004 | N-Gage | Action | ✓ |
| Alien Front Online (final prototype) | 25 June 2001 | Dreamcast | | - |
| Alien Syndrome (Prototype) | | Sega Master System | Action | - |
| Alien Trilogy (Jul 23, 1996 prototype) | 23 July 1996 | Sega Saturn | First-person shooter | - |
| Alien vs Predator (Apr 8, 1994 prototype) | 8 April 1994 | Atari Jaguar | FPS | - |
| Alien vs Predator (Aug 18, 1993 prototype) | 18 August 1993 | Atari Jaguar | FPS | - |
| Alien vs Predator (Oct 13, 1993 prototype) | 13 October 1993 | Atari Jaguar | FPS | - |
| Aliens (Prototype) | | FDS | Action | ✓ |
| Alone in the Dark: The New Nightmare (Apr 9, 2001 prototype) | 9 April 2001 03:56:32 | Dreamcast | Action-adventure | - |
| Alpha Protocol (Mar 25, 2010 prototype) | 25 March 2010 | Xbox 360 | Action role-playing | - |
| Amazing Spider-Man vs The Kingpin (Jun 2, 1993 prototype) | 2 June 1993 21:03:58 | Sega CD | Action | - |
| American Hero CD (Prototype) | | Atari Jaguar CD | FMV | ✓ |
| Amped 2 (Sep 30, 2003 prototype) | 30 September 2003 13:29:03 | Xbox | Extreme sports | - |
| Amplitude (May 27, 2003 prototype) | 27 May 2003 11:49:56 | PlayStation 2 | Music | - |
| Andre Agassi Tennis (Prototype) | | Game Gear | Sports - Tennis | - |
| Angels 2: Holy Night (Prototype) | | TurboGrafx-CD | Adventure | ✓ |
| Ape Escape 2 (Oct 28, 2002 prototype) | 28 October 2002 00:53:30 | PlayStation 2 | Action | - |
| Apocalypse (Jul 22, 1998 prototype) | 22 July 1998 21:12:42 | PlayStation | Third-person shooter | - |
| Apocalypse II (Oct 28, 1997 prototype) | 28 October 1997 09:24:52 | SNES | Shooter | ✓ |
| Aqua GT (Nov 16, 2000 prototype) | 16 November 2000 14:42:36 | PlayStation | Racing | - |
| Arabian Knights: Sabaku no Seirei Ou (Prototype) | | SNES | Role Playing | - |
| Arcade Classics (Sep 4, 1996 prototype) | 4 September 1996 | Philips CD-i | Compilation | - |
| Arcade's Greatest Hits: The Atari Collection 1 (Apr 11, 1997 prototype) | 11 April 1997 | SNES | Arcade | - |
| Arcade's Greatest Hits: The Atari Collection 1 (Feb 10, 1997 prototype) | 10 February 1997 | SNES | Arcade | - |
| Arcade's Greatest Hits: The Atari Collection 1 (Feb 11, 1997 prototype) | 11 February 1997 | SNES | Arcade | - |
| Arcana (prototype) | | SNES | Dungeon crawl | - |
| Area 51 (Mar 9, 2005 prototype) | 9 March 2005 14:31:02 | PlayStation 2 | First-person shooter | - |
| Arena Football 95 (Prototype) | | Atari Jaguar | Sports | ✓ |
| Aretha II: Ariel no Fushigi na Tabi (Early prototype) | | SNES | Role Playing | - |
| Aretha II: Ariel no Fushigi na Tabi (Prototype) | | SNES | Role Playing | - |
| Ariel the Little Mermaid (Oct 10, 1992 build) | 10 October 1992 10:27:54 | Sega Mega Drive | Adventure | - |
| Armed (Jan 22, 1997 prototype) | 22 January 1997 12:40:30 | Sega Saturn | Action | ✓ |
| Armed and Dangerous (Oct 13, 2003 prototype) | 13 October 2003 18:29:03 | Xbox | Shooter | - |
| Armored Core 2 (Nov 13, 2000 prototype) | 13 November 2000 18:54:12 | PlayStation 2 | Action | - |
| Army of Two: The Devil's Cartel (Jan 31, 2013 prototype) | 31 January 2013 | Xbox 360 | Third-person shooter | - |
| Arnold Palmer Tournament Golf (Mar 22, 1990 prototype) | 22 March 1990 10:33:32 | Sega Mega Drive | Sports | - |
| Around Hollywood (Apr 18, 1995 prototype) | 18 April 1995 | Philips CD-i | FMV | ✓ |
| Art Alive (Sep 20, 1991 build) | 20 September 1991 10:19:06 | Sega Mega Drive | Studio | - |
| Art of Fighting (Aug 1, 1994 prototype) | 1 August 1994 13:42:44 | Sega Mega Drive | Fighter (2D) | - |
| Art of Fighting (Jul 11, 1994 prototype) | 12 July 1994 01:13:38 | Sega Mega Drive | Fighter (2D) | - |
| Arthur and the Minimoys (Jan 17, 2007 prototype) | 17 January 2007 | PlayStation Portable | | - |
| Arx Fatalis (Jul 11, 2003 prototype) | 11 July 2003 | Xbox | Action role-playing game | - |
| Arx Fatalis (Sep 29, 2003 prototype) | 29 September 2003 | Xbox | | - |
| Ashen (May 1, 2004 prototype) | 1 May 2004 | N-Gage | Action | - |
| Asphalt - Urban (Sep 27, 2004 prototype) | 27 September 2004 | N-Gage | Racing | - |
| Assassin's Creed III (Sep 25, 2012 prototype) | 25 September 2012 | Xbox 360 | Action | - |
| Asterix & Obelix XXL (Feb 25, 2004 prototype) | 25 February 2004 | Nintendo GameCube | Action | - |
| Asterix (Feb 16, 1994 prototype) | 16 February 1994 11:05:14 | Game Gear | Action Platformer | - |
| Asterix (Feb 22, 1994 prototype) | 22 February 1994 09:14:06 | Game Gear | Action Platformer | - |
| Asterix (Jan 25, 1994 prototype) | 25 January 1994 16:53:24 | Game Gear | Action Platformer | - |
| Asterix (Mar 15, 1994 prototype) | 15 March 1994 11:54:48 | Game Gear | Action Platformer | - |
| Asterix (Mar 16, 1994 prototype) | 16 March 1994 16:58:18 | Game Gear | Action Platformer | - |
| Asterix (Mar 3, 1994 prototype) | 3 March 1994 10:02:44 | Game Gear | Action Platformer | - |
| Asteroids 2000 (prototype) | 20 July 1994 | Atari Jaguar | Shooter | ✓ |
| Astrocade (Aug 1, 1994 prototype) | 1 August 1994 | Sega Saturn | Puzzle | ✓ |
| Astérix & Obélix XXL 2: Mission: Las Vegum (Feb 25, 2005 prototype) | 25 February 2005 02:53:23 | PlayStation 2 | Action | - |
| Atari Karts (Prototype) | | Atari Jaguar | Racing | - |
| Atari Masterpieces Volume 1 (Aug 3, 2005 prototype) | 3 August 2005 | N-Gage | Compilation | - |
| Atari Masterpieces Volume 1 (Sep 20, 2005 prototype) | 20 September 2005 | N-Gage | Compilation | - |
| Atlantis no Nazo (Prototype) | | NES | Action | - |
| Atlantis: The Last Resort (Sep 18, 1996) | 18 September 1996 | Philips CD-i | FMV | ✓ |
| Atmosfear (Jul 12, 1994 prototype) | 12 July 1994 | SNES | Action | ✓ |
| Australian Rugby League (Prototype) | | Sega Mega Drive | Sports - Rugby | - |
| Awesome Possum Kicks Dr. Machino's Butt! (Prototype) | | Sega Mega Drive | Action | - |
| Ax Battler: A Legend of Golden Axe (Oct 8, 1991 prototype) | | Game Gear | Role Playing | - |
| Ayrton Senna's Super Monaco GP II (Prototype) | | Game Gear | Racing | - |
| BIONICLE: The Legend of Mata Nui (Jul 24, 2001 prototype) | 24 July 2001 08:22:00 | PC | Action | ✓ |
| BMX XXX (Oct 9, 2002 prototype) | 9 October 2002 04:58:14 | PlayStation 2 | Sports - Biking | - |
| Baby Boom (Aug 11, 1994 prototype) | 11 August 1994 21:54:54 | Sega Mega Drive | Misc | ✓ |
| Baby Boom (Jun 3, 1994 prototype) | 3 June 1994 19:14:18 | Sega Mega Drive | Misc | ✓ |
| Baby Boom (Jun 6, 1994 prototype) | 6 June 1994 18:02:48 | Sega Mega Drive | Misc | ✓ |
| Baby's Day Out (NAPALM prototype) | | Sega Mega Drive | Action | ✓ |
| Baby's Day Out (SNEAKERS prototype) | | Sega Mega Drive | Action | ✓ |
| Bakuryu (Nov 27, 1999 prototype) | 27 November 1999 15:23:58 | PlayStation | Sports - Kayaking | - |
| Baldur's Gate (Oct 4, 2000 prototype) | 4 October 2000 08:07:44 | PlayStation | Roleplaying | ✓ |
| Baldur's Gate: Dark Alliance (Oct 14, 2002 prototype) | 14 October 2002 | Nintendo GameCube | Role Playing | - |
| Ball Breakers (Oct 24, 2000 prototype) | 24 October 2000 | Dreamcast | Action | ✓ |
| Ball Busters (Prototype) | | Gizmondo | Action | ✓ |
| Ballz 3D: Fighting at its Ballziest (June prototype) | June 1994 | Sega Mega Drive | Fighting | - |
| Ballz 3D: Fighting at its Ballziest (September build) | September 1994 | Sega Mega Drive | Fighting | - |
| Banana (Jun 30, 1986 prototype) | | NES | Puzzle | - |
| Bangai-O (Apr 14, 2000 prototype) | 14 April 2000 15:37:16 | Dreamcast | Shooter | - |
| Banjo Pilot (Voxel prototype) | | Game Boy Advance | Racing | - |
| Banjo-Kazooie: Grunty's Revenge (0.37.08 prototype) | | Game Boy Advance | Platformer | - |
| Banjo-Kazooie: Grunty's Revenge (0.40.58 debug prototype) | | Game Boy Advance | Platformer | - |
| Barbie Super Model (Jun 30, 1993 prototype) | 30 June 1993 | Sega Mega Drive | Adventure | - |
| Barbie Super Model (Prototype) | | Game Gear | Action | - |
| Barbie: Vacation Adventure (Prototype) | | Sega Mega Drive | Adventure | ✓ |
| Barkley Shut Up and Jam! (Early prototype) | | Atari Jaguar | Sports | ✓ |
| Barkley Shut Up and Jam! (Prototype) | | Atari Jaguar | Sports | ✓ |
| Barkley Shut Up and Jam! 2 prototype | | Sega Mega Drive | Sports - Basketball | - |
| Barney's Hide & Seek Game (Sep 18, 1993 build) | 18 September 1993 19:01:44 | Sega Mega Drive | Adventure | - |
| Barnyard (Prototype) | | Game Boy Advance | Action | - |
| Bass Masters 2000 (Prototype) | | Nintendo 64 | Fishing | - |
| Batman (Later Prototype) | | NES | Action | - |
| Batman (Older Beta) | | NES | Action | - |
| Batman Returns (Apr 23, 1993 prototype) | 23 April 1993 16:34:29 | Sega CD | Action | - |
| Batman Returns (PAL prototype) | | NES | Action | - |
| Batman Returns (Prototype) | | SNES | Action | - |
| Batman: Arkham Asylum (prototype) | | Nintendo DS | Action-adventure | ✓ |
| Batman: Dark Tomorrow (Feb 26, 2003 prototype) | 26 February 2003 | Xbox | Action-adventure | - |
| Batman: Return of the Joker (Prototype) | | NES | Action | - |
| Battle Arena Toshinden URA (Nov 7, 1996 prototype) | 7 November 1996 21:53:18 | Sega Saturn | Fighting | - |
| Battle Mania (May 28, 1991 prototype) | 28 May 1991 15:22:58 | Sega Mega Drive | Shooter | - |
| Battle Master: Kyuukyoku no Senshi-tachi (Prototype) | | SNES | Fighting | - |
| Battle Squadron (Jan 18, 1991 prototype) | 18 January 1991 14:24:36 | Sega Mega Drive | Shooter | - |
| Battle Wings (Prototype) | | Sega Master System | Shooters | - |
| Battle vs. Chess (Feb 6, 2012 prototype) | 6 February 2012 | PlayStation Portable | Board game | ✓ |
| BattleSport (May 11, 1995 prototype) | 11 May 1995 | 3DO | Sports | - |
| Battlecorps (Feb 11, 1994 prototype) | 11 February 1994 16:07:39 | Sega CD | Action | - |
| Battlecruiser 3000AD (Nov 8, 1995 prototype) | 8 November 1995 14:39:32 | PC | Space trading and combat simulator | - |
| Battletech: Gray Death Legion (Jan 5, 1995 prototype) | 5 January 1995 14:06:36 | Sega CD | Shooter | ✓ |
| Battletoads (Game Boy Advance) (prototype) | | Game Boy Advance | Beat 'em up, platformer | ✓ |
| Battletoads in Battlemaniacs (prototype) | | SNES | Beat 'em up, platformer | - |
| Bayonetta (May 24, 2009 prototype) | 24 May 2009 | Xbox 360 | Action | - |
| Beach Volleyball (Apr 21, 2000 prototype) | 21 April 2000 | PlayStation | | - |
| Beast Wrestler (Sep 13, 1991 prototype) | 13 September 1991 15:13:32 | Sega Mega Drive | Fighting | - |
| Beastball (Prototype) | | Sega Mega Drive | Action | ✓ |
| Beauty Guide (Apr 4, 1995 prototype) | 4 April 1995 | Philips CD-i | FMV | ✓ |
| Beavis and Butt-head (Prototype) | | Game Gear | Action | - |
| Beethoven's 2nd (Sep 13, 1993 prototype) | 13 September 1993 | SNES | Action | - |
| Berenstain Bears (Aug 1, 1994 prototype) | 1 August 1994 21:59:02 | Game Gear | Action Platformer | - |
| Berenstain Bears (Aug 11, 1994 prototype A) | 11 August 1994 11:48:12 | Game Gear | Action Platformer | - |
| Berenstain Bears (Aug 11, 1994 prototype) | 11 August 1994 07:14:54 | Game Gear | Action Platformer | - |
| Berenstain Bears (Aug 12, 1994 prototype) | 12 August 1994 19:55:02 | Game Gear | Action Platformer | - |
| Berenstain Bears (Aug 13, 1994 prototype) | 13 August 1994 20:40:22 | Game Gear | Action Platformer | - |
| Berenstain Bears (Aug 14, 1994 prototype) | 14 August 1994 09:43:42 | Game Gear | Action Platformer | - |
| Berenstain Bears (Aug 19, 1994 prototype) | | Game Gear | Action Platformer | - |
| Berenstain Bears (Aug 20, 1994 prototype) | 20 August 1994 09:32:14 | Game Gear | Action Platformer | - |
| Berenstain Bears (Aug 24, 1994 prototype) | 23 August 1994 22:37:30 | Game Gear | Action Platformer | - |
| Berenstain Bears (Aug 25, 1994 prototype B) | 25 August 1994 11:28:36 | Game Gear | Action Platformer | - |
| Berenstain Bears (Aug 26, 1994 prototype B) | 26 August 1994 15:26:56 | Game Gear | Action Platformer | - |
| Berenstain Bears (Aug 26, 1994 prototype) | 26 August 1994 07:30:32 | Game Gear | Action Platformer | - |
| Berenstain Bears (Aug 27, 1994 prototype) | 27 August 1994 18:44:58 | Game Gear | Action Platformer | - |
| Berenstain Bears (Jul 15, 1994 prototype B) | 15 July 1994 16:24:24 | Game Gear | Action Platformer | - |
| Berenstain Bears (Jul 21, 1994 prototype) | 21 July 1994 09:15:14 | Game Gear | Action Platformer | - |
| Berenstain Bears (Jul 22, 1994 prototype) | 22 July 1994 22:54:10 | Game Gear | Action Platformer | - |
| Berenstain Bears (Jul 27, 1994 prototype) | 27 July 1994 22:15:56 | Game Gear | Action Platformer | - |
| Berenstain Bears (Jun 28, 1994 prototype) | 28 June 1994 14:34:10 | Game Gear | Action Platformer | - |
| Berenstain Bears' A School Day (Dec 20, 1994 prototype) | 20 December 1994 16:01:36 | Sega Pico | Educational | - |
| Berenstain Bears' A School Day (Jan 13, 1995 prototype) | 13 January 1995 16:03:16 | Sega Pico | Educational | - |
| Berenstain Bears' A School Day (Jan 16, 1995 prototype) | 16 January 1995 18:14:54 | Sega Pico | Educational | - |
| Berenstain Bears' A School Day (Jan 26, 1995 prototype) | 26 January 1995 14:10:12 | Sega Pico | Educational | - |
| Berenstain Bears' A School Day (Jan 27, 1995 prototype) | 27 January 1995 22:16:34 | Sega Pico | Educational | - |
| Berenstain Bears' A School Day (Jan 30, 1995 prototype) | 30 January 1995 13:02:26 | Sega Pico | Educational | - |
| Berenstain Bears' A School Day (Jan 31, 1995 prototype) | 31 January 1995 16:07:20 | Sega Pico | Educational | - |
| Berenstain Bears' A School Day (Jan 6, 1995 prototype) | 6 January 1995 16:55:26 | Sega Pico | Educational | - |
| Berserk: Millennium Falcon Hen Seima Senki no Shou (Jul 12, 2004 prototype) | 12 July 2004 10:28:00 | PlayStation 2 | Action | - |
| Beyond (Sep 12, 2005 prototype) | 12 September 2005 | Xbox | Third-person shooter | ✓ |
| Beyond Oasis (Apr 1994 prototype) | July 1994 | Sega Mega Drive | Role-Playing | - |
| Beyond Oasis (Nov 1, 1994 prototype) | 1 November 1994 16:05:02 | Sega Mega Drive | Role-Playing | - |
| Beyond Oasis (Nov 15, 1994 prototype) | 17 November 1994 10:00:00 | Sega Mega Drive | Role-Playing | - |
| Beyond Oasis (Oct 17, 1994 prototype) | 19 October 1994 10:22:48 | Sega Mega Drive | Role-Playing | - |
| Beyond Oasis (Oct 4, 1994 prototype) | 4 October 1994 20:09:48 | Sega Mega Drive | Role-Playing | - |
| Big Bang Pro Wrestling (Prototype) | | Neo Geo Pocket Color | Wrestling | - |
| Big Bang Show (May 30, 1994) | 30 May 1994 | Philips CD-i | FMV | ✓ |
| Big Sky Trooper (May 23, 1995 prototype) | 23 May 1995 | SNES | Action | - |
| Bill's Tomato Game (Prototype) | | Sega Mega Drive | Puzzle | ✓ |
| Bio Force Ape (Prototype) | 1991 | NES | Action Beat 'em up,Platform | ✓ |
| BioShock 2 (Nov 30, 2009 prototype) | 30 November 2010 | Xbox 360 | First-person shooter | - |
| Biohazard (Aug 4, 1995 prototype) | 4 August 1995 18:31:10 | PlayStation | Survival Horror | - |
| Biohazard (Jan 31, 1996 prototype) | 31 January 1996 | PlayStation | Survival Horror | - |
| Biohazard (Oct 4, 1995 prototype) | 4 October 1995 13:03:42 | PlayStation | Survival Horror | - |
| Biohazard 2 (Nov 6, 1996 prototype) | 6 November 1996 13:10:10 | PlayStation | Survival Horror | - |
| Biohazard 2 (Oct 30, 1997 prototype) | 30 October 1997 20:12:52 | PlayStation | Survival Horror | - |
| Biohazard 2 Trial with Rockman Neo Demo | 6 August 1997 16:00:00 | PlayStation | Demo | - |
| Biohazard Outbreak (Nov 26, 2003 prototype) | 26 November 2003 09:35:39 | PlayStation 2 | Survival Horror | - |
| Bionicle 2 (Jan 21, 2004 Tech Demo) | 21 January 2004 | Xbox | Action | ✓ |
| Bionicles Heroes (Prototype) | | Nintendo DS | Action | - |
| Black (Aug 16, 2005 prototype) | 16 August 2005 00:40:55 | PlayStation 2 | First-person shooter | - |
| Black Hole Assault (Oct 1, 1992 prototype) | 1 October 1992 18:37:04 | Sega CD | Action | - |
| Black Ice / White Noise (Prototype) | | Atari Jaguar CD | Action | ✓ |
| BlackThorne (Incomplete Prototype) | | Sega 32X | Action | - |
| Blade Eagle (Prototype) | | Sega Master System | Shooter | - |
| Blade Force (Aug 8, 1995 prototype) | 8 August 1995 | 3DO | Shooter | - |
| Blade Force (Jul 14, 1995 prototype) | 14 July 1995 | 3DO | Shooter | - |
| Blaster Master (May 20, 1988 prototype) | 20 May 1988 | NES | Action | - |
| Blaster Master 2 (Late NTSC Beta) | 15 April 1993 | Sega Mega Drive | Run And Gun | - |
| Bleemcast! (prototype) | | Dreamcast | Application | ✓ |
| Block Out (Prototype) | | NES | Puzzle | ✓ |
| Blood Lines (Jun 21, 1998 prototype) | 21 June 1998 | PlayStation | Action | - |
| Blood Lines (May 12, 1997 prototype) | 12 May 1997 00:27:38 | PlayStation | Action | - |
| Blood Omen: Legacy of Kain (Jul 12, 1996 prototype) | 12 July 1996 | PlayStation | Action-adventure | - |
| Blood Omen: Legacy of Kain (Jul 15, 1996 prototype) | 15 July 1996 | PlayStation | Action-adventure | - |
| Blood Omen: Legacy of Kain (Sep 16, 1996 prototype) | 16 September 1996 | PlayStation | Action-adventure | - |
| BloodRayne (Oct 22, 2002 prototype) | 22 October 2002 | PC | Action | - |
| Bloodshot (Mar 9, 1995 prototype) | 9 March 1995 11:56:18 | Sega CD | FPS | ✓ |
| Bloody Roar: Primal Fury (Jan 8, 2002 prototype) | 8 January 2002 | Nintendo GameCube | Fighting | - |
| Blue Angelo: Angels from the Shrine (Early prototype) | | Game Boy Advance | Action | ✓ |
| Blue Angelo: Angels from the Shrine (Late prototype) | | Game Boy Advance | Action | ✓ |
| Blue Lightning Tour 1 (Prototype) | | Atari Jaguar CD | Action | - |
| Blue Lightning Tour 2 (Prototype) | | Atari Jaguar CD | Action | - |
| Blue Lightning Tour 3 (Prototype) | | Atari Jaguar CD | Action | - |
| Blue Lightning Tour 4 (Apr 10, 1995 prototype) | 10 April 1995 | Atari Jaguar CD | Shooter | ✓ |
| Blue Lightning Tour 5 (Apr 7, 1995 prototype) | 7 April 1995 | Atari Jaguar CD | Shooter | ✓ |
| Blue Lightning Tour 6 (Apr 11, 1995 prototype) | 11 April 1995 | Atari Jaguar CD | Shooter | ✓ |
| Blue Stinger (prototype) | | Dreamcast | Action | - |
| Bobby's World (Prototype) | | SNES | Action | ✓ |
| Body Count (Feb 28, 1994 prototype U) | 28 February 1994 11:23:52 | Sega Mega Drive | Shooter | ✓ |
| Body Count (Feb 8, 1994 prototype) | 28 February 1994 11:23:52 | Sega Mega Drive | Shooter | ✓ |
| Body Count (Jan 27, 1994 prototype) | 27 January 1994 16:33:54 | Sega Mega Drive | Shooter | ✓ |
| Body Count (Mar 3, 1994 prototype) | 3 March 1994 14:12:32 | Sega Mega Drive | Shooter | ✓ |
| Body Count (Mar 8, 1994 prototype A) | 8 March 1994 13:31:38 | Sega Mega Drive | Shooter | ✓ |
| Body Count (Mar 8, 1994 prototype) | 8 March 1994 13:31:38 | Sega Mega Drive | Shooter | ✓ |
| Body Count (Mar 9, 1994 prototype) | 9 March 1994 11:09:32 | Sega Mega Drive | Shooter | ✓ |
| Bodycount (Jul 9, 2011 prototype) | 9 July 2011 | Xbox 360 | First-person shooter | - |
| Bomberman (May 27, 2004 prototype) | 27 May 2004 | N-Gage | Action, Maze | - |
| Bomberman Online (Feb 7, 2001 prototype) | 7 February 2001 15:15:32 | Dreamcast | Multiplayer | - |
| Bomberman Online (Sep 8, 2001 prototype) | 8 September 2001 09:06:30 | Dreamcast | Multiplayer | - |
| Bonkers (Aug 25, 1994 prototype) | 25 August 1994 06:47:02 | Sega Mega Drive | Action Platformer | - |
| Bonkers (Aug 29, 1994 prototype) | 29 August 1994 02:16:08 | Sega Mega Drive | Action Platformer | - |
| Bonkers (Aug 4, 1994 prototype) | 4 August 1994 11:46:28 | Sega Mega Drive | Action Platformer | - |
| Bonkers (Mar 28, 1994 prototype) | 5 April 1994 07:00:02 | Sega Mega Drive | Action Platformer | - |
| Bonkers (May 3, 1994 prototype) | 6 May 1994 19:11:48 | Sega Mega Drive | Action Platformer | - |
| Bonkers Wax Up! (Dec 11, 1994 prototype) | 11 December 1994 19:45:16 | Game Gear | Action Platformer | - |
| Bonkers Wax Up! (Dec 12, 1994 prototype D) | 12 December 1994 18:40:02 | Game Gear | Action Platformer | - |
| Bonkers Wax Up! (Dec 3, 1994 prototype) | 3 December 1994 22:59:16 | Game Gear | Action Platformer | - |
| Bonkers Wax Up! (Dec 5, 1994 prototype) | 5 December 1994 09:00:36 | Game Gear | Action Platformer | - |
| Bonkers Wax Up! (Dec 7, 1994 prototype C) | 7 December 1994 23:52:50 | Game Gear | Action Platformer | - |
| Bonkers Wax Up! (Dec 8, 1994 prototype B) | 8 December 1994 18:49:32 | Game Gear | Action Platformer | - |
| Bonkers Wax Up! (Dec 8, 1994 prototype C) | 8 December 1994 21:45:34 | Game Gear | Action Platformer | - |
| Bonkers Wax Up! (Nov 15, 1994 prototype) | 15 November 1994 09:47:12 | Game Gear | Action Platformer | - |
| Bonkers Wax Up! (Nov 21, 1994 prototype) | 21 November 1994 09:07:40 | Game Gear | Action Platformer | - |
| Bonkers Wax Up! (Nov 23, 1994 prototype) | 23 November 1994 14:31:38 | Game Gear | Action Platformer | - |
| Bonkers Wax Up! (Nov 26, 1994 prototype) | 26 November 1994 12:19:56 | Game Gear | Action Platformer | - |
| Bonkers Wax Up! (Nov 29, 1994 prototype) | 29 November 1994 21:17:10 | Game Gear | Action Platformer | - |
| Bonkers Wax Up! (Oct 31, 1994 prototype) | 31 October 1994 16:42:22 | Game Gear | Action Platformer | - |
| Boogerman: A Pick and Flick Adventure (Apr, 1996 Prototype) | April 1996 | NES | Platform Game | - |
| Bounty Arms (Jan 30, 1995 prototype) | | PlayStation | Action | ✓ |
| Bounty Sword (May 16, 1995 prototype) | 16 May 1995 | SNES | Role Playing | - |
| Boxing Legends of the Ring (prototype) | | SNES | Sports | - |
| Brain Dead 13 (Jun 11, 1996 prototype) | 11 June 1996 | Philips CD-i | FMV | ✓ |
| Breakneck (Feb 5, 1998 prototype) | 5 February 1998 01:01:06 | PlayStation | Racing | ✓ |
| Breakout 2000 (Prototype) | | Atari Jaguar | Puzzle | - |
| Breath of Fire II (Prototype) | | SNES | RPG | - |
| Breath of Fire IV (May 1, 2000 prototype) | 1 May 2000 | PlayStation | Role-playing | - |
| Brett Hull Hockey (Prototype) | | Atari Jaguar | Sports | ✓ |
| Brett Hull NHL Hockey (Prototype) | | Atari Jaguar CD | Sports - Hockey | - |
| Brothers in Arms: Road to Hill 30 (Nov 18, 2004 prototype) | 18 November 2004 03:15:24 | Xbox | First-person shooter | - |
| Brunswick Pro Bowling (April 2nd, 2007 prototype) | 2 April 2007 14:42:46 | PlayStation 2 | Sports | - |
| Bubble Bobble (Game Gear Prototype) | | Game Gear | Puzzle | - |
| Bubble Bobble II (Dec 13, 1993 prototype) | 13 December 1993 15:50:00 | Arcade | Puzzle | - |
| Bubble and Squeak (PAL prototype) | | Sega Mega Drive | Platform | - |
| Bubsy 3D (Mar 13, 1997 prototype) | 13 March 1997 11:15:18 | PlayStation | Platformer | - |
| Bubsy in Claws Encounters of the Furred Kind (Prototype A) | | SNES | Platformer | - |
| Bubsy in Claws Encounters of the Furred Kind (Prototype B) | | SNES | Platformer | - |
| Budokan - The Martial Spirit (Sep 25, 1990 prototype) | 25 September 1990 19:09:38 | Sega Mega Drive | Sports | - |
| Bug Blasters: The Exterminators (Jan 23, 1995 prototype) | 23 January 1995 16:12:35 | Sega CD | Shoot-'em-Up | ✓ |
| Burn Out (Prototype) | 7 January 1995 | Atari Jaguar | Racing | - |
| Burning Fists: Force Striker (Dec 7, 1993 prototype) | 7 December 1993 09:12:08 | Sega CD | Action | ✓ |
| Burnout (Mar 6, 2002 prototype) | 6 March 2002 | Nintendo GameCube | Racing | - |
| Burnout 2: Point of Impact (Aug 31, 2002 prototype) | 31 August 2002 | PlayStation 2 | | - |
| Burnout 3: Takedown (Jul 20, 2004 11.14 prototype) | 20 July 2004 11:14:24 | PlayStation 2 | Racing | - |
| Burnout Paradise (Feb 22, 2007 prototype) | 22 February 2007 13:14:04 | Xbox 360 | Racing | - |
| Burnout Paradise (Oct 31, 2007 prototype) | 31 October 2007 | Xbox 360 | Racing | - |
| Burnout Revenge (Aug 4, 2005 prototype) | 4 August 2005 16:04:15 | PlayStation 2 | Racing | - |
| Burnout Revenge (Feb 7, 2006 prototype) | 7 February 2006 | Xbox 360 | Racing | - |
| Burnout Revenge (July 14, 2005 prototype) | 14 July 2005 | PlayStation 2 | Racing | - |
| Bust A Move (Jul 30, 1998 prototype) | 30 July 1998 21:06:02 | PlayStation | Rhythm - Dancing | - |
| Bust-A-Groove (Aug 27, 1998 prototype) | 27 August 1998 | PlayStation | Music, fighting | - |
| Bust-a-Move Pocket (Prototype) | | Neo Geo Pocket Color | Dancing | - |
| Buzz! Junior: RoboJam (Jan 12, 2007 prototype) | 12 January 2007 | PlayStation 2 | | - |
| CD-I Prototype Disc - Philips Interactive Media Systems Presents Some Technical Aspects of CD-I | 1 September 1988 | Philips CD-i | FMV | ✓ |
| CJ: Elephant Fugitive (Oct 22, 1993 prototype) | 22 October 1993 | Game Gear | Action | - |
| CJ: Elephant Fugitive (Prototype) | | Sega Master System | Action | ✓ |
| Cadillac (sample) | | NES | | - |
| California Speed (Prototype) | | Nintendo 64 | Racing | ✓ |
| Call of Duty (Oct 21, 2005 prototype) | 21 October 2005 | N-Gage | FPS | - |
| Call of Duty 4: Modern Warfare (Pre-Alpha Build 290) | 2007 | Xbox 360 | First-person shooter | - |
| Call of Duty 4: Modern Warfare (Pre-Alpha Build 328) | 11 June 2007 | Xbox 360 | First-person shooter | - |
| Cannon Fodder (Prototype) | | Game Boy Color | Action | - |
| Capcom Fighting Jam (Oct 29, 2004 prototype) | 29 October 2004 16:06:49 | PlayStation 2 | Fighting | - |
| Captain Harlock (Non Interactive Demo) | | Game Boy Advance | Role Playing | ✓ |
| Captain Quazar (Sep 21, 1995 prototype) | 21 September 1995 | 3DO | Shooter | - |
| Captain Silver (Prototype) | | Sega Master System | Action | - |
| Cardinal Syn (Dec 14, 1997 prototype) | 15 December 1997 06:20:38 | PlayStation | Fighting | - |
| Cardinal Syn (Feb 27, 1998 prototype) | 27 February 1998 23:37:10 | PlayStation | Fighting | - |
| Carmageddon (Prototype) | | Gizmondo | Vehicular combat | ✓ |
| Carol Vorderman's Sudoku (Jun 7, 2006 prototype) | 7 June 2006 16:08:20 | PlayStation 2 | Puzzle | - |
| Carrier (May 10, 1999 prototype) | 10 May 1999 | Dreamcast | Survival Horror | - |
| Castle of Illusion: Starring Mickey Mouse (May 25, 1990 prototype) | 25 May 1990 | Sega Master System | Action | - |
| Castlevania Bloodlines (Aug 4, 1993 prototype) | 4 August 1993 | Sega Mega Drive | Platform | - |
| Castlevania The Dracula X Chronicles (Castlevania The Dracula X Chronicles (Jan 30, 2007) | 30 January 2007 | PlayStation Portable | Platform-adventure | - |
| Castlevania: Symphony of the Night (E3 Prototype) | 18 June 1997 08:33:38 | PlayStation | Action/RPG | - |
| Catan (May 3, 2005 prototype) | 3 May 2005 12:16:12 | N-Gage | Turn-based strategy | - |
| Catapult (Prototype) | | Gizmondo | Action | ✓ |
| Catrap (prototype) | | Game Boy | Puzzle | - |
| Cave Dude (Prototype) | | Game Gear | Action | ✓ |
| Caves of Fear CD (Prototype) | | Atari Jaguar CD | FMV | ✓ |
| Center Ring Boxing (Sep 26, 1995 prototype) | 26 September 1995 12:09:50 | Sega Saturn | Fighting | - |
| Centurion - Defender of Rome (Apr 24, 1991 build) | 24 April 1991 16:13:40 | Sega Mega Drive | Strategy | - |
| Chakan - The Forever Man (Oct 6, 1992 build) | 6 October 1992 10:20:42 | Sega Mega Drive | Platformer | - |
| Champions World Class Soccer (Mar 18, 1994 prototype) | 18 March 1994 | Sega Mega Drive | Sports - Soccer | - |
| Champions: Return to Arms (Sep 9, 2004 prototype) | 9 September 2004 19:32:00 | PlayStation 2 | Action role-playing, hack and slash | - |
| Championship Manager 2010 (Prototype) | | PlayStation Portable | Sports | - |
| Championship Surfer (Aug 15, 2000 prototype) | 15 August 2000 22:02:34 | Dreamcast | Sports - Surfing | - |
| Chaos Control (May 29, 1996 prototype) | 29 May 1996 | Sega Saturn | Rail shooter | - |
| Chaos Control (Oct 14, 1994 prototype) | 14 October 1994 | Philips CD-i | Rail shooter | - |
| Chaos Control (Oct 3, 1994 prototype) | 3 October 1994 | Philips CD-i | Rail shooter | - |
| Checkered Flag (CES 1993 prototype) | August 1993 | Atari Jaguar | Racing | - |
| Chelnov (Jul 23, 1997 prototype) | 23 July 1997 13:41:20 | Sega Saturn | Action | ✓ |
| Chester Field: Ankoku Shin heno Chousen (Prototype) | | NES | Action | - |
| Chibi Maruko-chan: Mezase! Minami no Island!! (Prototype) | | SNES | Action | - |
| Chicago Syndicate (Jul 10, 1995 prototype) | 10 July 1995 16:29:00 | Game Gear | Beatem Up | - |
| Chicago Syndicate (Jul 11, 1995 prototype) | 11 July 1995 17:24:06 | Game Gear | Beatem Up | - |
| Chicago Syndicate (Jul 19, 1995 prototype) | 19 July 1995 16:41:32 | Game Gear | Beatem Up | - |
| Chicago Syndicate (Jul 20, 1995 prototype) | 20 July 1995 15:45:16 | Game Gear | Beatem Up | - |
| Chicago Syndicate (Jul 21, 1995 prototype B) | 21 July 1995 17:43:06 | Game Gear | Beatem Up | - |
| Chicago Syndicate (Jul 21, 1995 prototype) | 21 July 1995 11:57:16 | Game Gear | Beatem Up | - |
| Chicago Syndicate (Jul 27, 1995 prototype) | 27 July 1995 10:20:48 | Game Gear | Beatem Up | - |
| Chicago Syndicate (Jul 3, 1995 prototype) | 3 July 1995 21:26:08 | Game Gear | Beatem Up | - |
| Chicago Syndicate (Jul 5, 1995 prototype) | 5 July 1995 22:12:20 | Game Gear | Beatem Up | - |
| Chicago Syndicate (Jul 6, 1995 prototype) | 6 July 1995 22:12:46 | Game Gear | Beatem Up | - |
| Chicago Syndicate (Jun 1, 1995 prototype) | 1 June 1995 19:02:08 | Game Gear | Beatem Up | - |
| Chicago Syndicate (Jun 12, 1995 prototype) | 12 June 1995 18:08:16 | Game Gear | Beatem Up | - |
| Chicago Syndicate (Jun 14, 1995 prototype) | 14 June 1995 19:14:42 | Game Gear | Beatem Up | - |
| Chicago Syndicate (Jun 19, 1995 prototype) | 19 June 1995 21:28:26 | Game Gear | Beatem Up | - |
| Chicago Syndicate (Jun 20, 1995 prototype) | 20 June 1995 19:59:32 | Game Gear | Beatem Up | - |
| Chicago Syndicate (Jun 22, 1995 prototype) | 22 June 1995 17:45:20 | Game Gear | Beatem Up | - |
| Chicago Syndicate (Jun 26, 1995 prototype) | 26 June 1995 18:45:58 | Game Gear | Beatem Up | - |
| Chicago Syndicate (Jun 28, 1995 prototype) | 27 June 1995 23:26:34 | Game Gear | Beatem Up | - |
| Chicago Syndicate (Jun 29, 1995 prototype B) | 29 June 1995 22:41:06 | Game Gear | Beatem Up | - |
| Chicago Syndicate (Jun 29, 1995 prototype) | 29 June 1995 00:31:34 | Game Gear | Beatem Up | - |
| Chicago Syndicate (Jun 30, 1995 prototype B) | 30 June 1995 16:10:36 | Game Gear | Beatem Up | - |
| Chicago Syndicate (Jun 5, 1995 prototype) | 5 June 1995 21:41:40 | Game Gear | Beatem Up | - |
| Chicago Syndicate (Jun 7, 1995 prototype) | 7 June 1995 09:13:40 | Game Gear | Beatem Up | - |
| Chicago Syndicate (Jun 8, 1995 prototype) | 8 June 1995 17:45:00 | Game Gear | Beatem Up | - |
| Chicago Syndicate (Mar 20, 1995 prototype) | 20 March 1995 | Game Gear | Action | - |
| Chicago Syndicate (May 5, 1995 prototype) | 5 May 1995 17:53:08 | Game Gear | Beatem Up | - |
| Chicane: Jenson Button Street Racing (Prototype) | | Gizmondo | Racing | - |
| Chili Con Carnage (Sep 23, 2006 prototype) | 23 September 2006 20:19:43 | PlayStation Portable | Action | - |
| Chill (Jan 19, 1998 prototype) | 19 January 1998 15:27:47 | Sega Saturn | Sports | ✓ |
| Chip 'N Dale: Rescue Rangers (Prototype) | | NES | Action | - |
| Choplifter! (Jul 1, 1986 prototype) | | Sega Master System | Action | - |
| Choplifter! (SG-1000 Prototype) | | SG-1000 | Action | - |
| Choplifter! (Sega Master System Prototype) | | Sega Master System | Action | - |
| Choro Q (Aug 14, 2004 prototype) | 14 August 2004 18:17:49 | PlayStation 2 | Racing, Role-playing | - |
| Chou Majin Eiyuuden Wataru: Mazekko Monster (Prototype) | | Game Boy | Role Playing | - |
| Chouon Senshi Borgman (Prototype) | | Sega Master System | Action | - |
| Chrono Cross (Apr 11, 2000 prototype) | 11 April 2000 17:45:00 | PlayStation | Role Playing | - |
| Chrono Cross (Mar 8, 2000 prototype) | 8 March 2000 14:05:00 | PlayStation | Role Playing | - |
| Chu Chu Rocket (prototype) | | Dreamcast | Puzzle | - |
| Chuck Rock (Prototype) | | Game Gear | Action | - |
| Chuck Yeager's Fighter Combat (Prototype) | | NES | Shooting | ✓ |
| Cipher Complex (Feb 23, 2009 prototype) | 23 February 2009 18:04:37 | Xbox 360 | Stealth | ✓ |
| Citizen X (Jan 8, 1993 prototype) | 8 January 1993 11:02:37 | Sega CD | FMV | ✓ |
| ClayFighter 2: Judgment Clay (Apr 28, 1995 prototype) | 28 April 1995 | Sega 32X | Fighting | ✓ |
| ClayFighter 63 1/3 (Aug 21, 1997 prototype) | 21 August 1997 07:16:21 | Nintendo 64 | Fighting | - |
| Clock Tower (Prototype) | | SNES | Survival Horror | - |
| Clock Tower 2: The Door of the Fear (Sep 30, 1996 prototype) | 30 September 1996 13:52:50 | PlayStation | Survival Horror | - |
| Clockwork Knight - Pepperouchau's Adventure Sample (Nov 15, 1994 build) | 14 November 1994 | Sega Saturn | Platformer | - |
| Clockwork Knight 2 (Aug 30, 1995 prototype) | 30 August 1995 14:53:35 | Sega Saturn | Action | - |
| Clockwork Knight: Pengin War (Oct 21, 1995 prototype) | 21 October 1995 04:00:09 | Sega Saturn | Action | ✓ |
| Close Combat: First to Fight (Mar 13, 2005 prototype) | 13 March 2005 | Xbox | FPS | - |
| Club Drive (Prototype) | | Atari Jaguar | Racing | - |
| Cluedo (Sep 16, 1994 prototype) | 16 September 1994 | Philips CD-i | Mystery | - |
| Cobra Command (Oct 10, 1992 prototype) | 10 October 1992 02:51:06 | Sega CD | Shooting | - |
| Cocoto Kart Racer (Prototype) | | Nintendo DS | Racing | - |
| Cold Winter (Feb 9, 2005 prototype) | 9 February 2005 04:24:55 | PlayStation 2 | First-person shooter | - |
| Colin McRae Rally 3 (Aug 19, 2002 prototype) | 19 August 2002 10:56:31 | Xbox | Racing | - |
| College Football USA 96 (Jun 21, 1995 prototype) | | Sega Mega Drive | Sports - Football | - |
| College Football's National Championship (Apr 13, 1994 prototype) | 13 April 1994 21:36:44 | Sega Mega Drive | Sports - Football | - |
| College Football's National Championship (Apr 18, 1994 prototype) | 19 April 1994 11:09:46 | Sega Mega Drive | Sports - Football | - |
| College Football's National Championship (Apr 19, 1994 prototype) | 19 April 1994 11:08:08 | Sega Mega Drive | Sports - Football | - |
| College Football's National Championship (Apr 29, 1994 prototype) | 29 April 1994 16:25:22 | Sega Mega Drive | Sports - Football | - |
| College Football's National Championship (Jun 1, 1994 prototype) | 1 June 1994 09:38:52 | Sega Mega Drive | Sports - Football | - |
| College Football's National Championship (Jun 14, 1994 prototype) | 14 June 1994 11:46:30 | Sega Mega Drive | Sports - Football | - |
| College Football's National Championship (Jun 15, 1994 prototype) | 15 June 1994 19:40:02 | Sega Mega Drive | Sports - Football | - |
| College Football's National Championship (Jun 18, 1994 prototype) | 21 June 1994 09:02:12 | Sega Mega Drive | Sports - Football | - |
| College Football's National Championship (Jun 20, 1994 prototype) | 20 June 1994 07:25:38 | Sega Mega Drive | Sports - Football | - |
| College Football's National Championship (Jun 3, 1994 prototype) | 3 June 1994 15:17:06 | Sega Mega Drive | Sports - Football | - |
| College Football's National Championship (Jun 7, 1994 prototype) | 7 June 1994 09:49:08 | Sega Mega Drive | Sports - Football | - |
| College Football's National Championship (Jun 8, 1994 prototype) | 8 June 1994 09:29:54 | Sega Mega Drive | Sports - Football | - |
| College Football's National Championship (May 11, 1994 prototype A) | 11 May 1994 14:28:22 | Sega Mega Drive | Sports - Football | - |
| College Football's National Championship (May 17, 1994 prototype A) | 17 May 1994 09:11:48 | Sega Mega Drive | Sports - Football | - |
| College Football's National Championship (May 20, 1994 prototype) | 20 May 1994 17:21:32 | Sega Mega Drive | Sports - Football | - |
| College Football's National Championship (May 25, 1994 prototype) | 25 May 1994 14:15:58 | Sega Mega Drive | Sports - Football | - |
| College Football's National Championship (May 3, 1994 prototype) | 3 May 1994 15:19:14 | Sega Mega Drive | Sports - Football | - |
| College Football's National Championship (May 31, 1994 prototype) | 31 May 1994 18:54:48 | Sega Mega Drive | Sports - Football | - |
| College Football's National Championship (May 6, 1994 prototype) | 6 May 1994 15:43:48 | Sega Mega Drive | Sports - Football | - |
| Colliderz (Jun 13, 1997 prototype) | 13 June 1997 16:30:12 | Sega Saturn | Action | ✓ |
| Colors (Prototype) | | Gizmondo | Third-person shooter | ✓ |
| Colors of Modern Rock (Feb 22, 1993 prototype) | 22 February 1993 12:16:20 | Sega CD | Video | - |
| Columbus: Ougon no Yoake (Prototype) | | NES | Role Playing | - |
| Columns (Jun 21, 1990 build) | 21 June 1990 10:20:50 | Sega Mega Drive | Puzzle | - |
| Columns (Prototype) | | Sega Master System | Puzzle | - |
| Combat Elite: WWII Paratroopers (May 13, 2004 prototype) | 11 May 2004 | PlayStation 2 | Action role-playing game | - |
| Combat II (Jun 1, 1983 prototype) | 1 June 1983 | Atari 2600 | Flight Simulator | ✓ |
| Combat II (Prototype) | | Atari 2600 | Flight Simulator | ✓ |
| Comix Zone (Apr 4, 1995 prototype) | 4 April 1995 | Sega Mega Drive | Beatem Up | - |
| Comix Zone (Jul 12, 1995 prototype FULSCR) | 12 July 1995 11:33:30 | Sega Mega Drive | Beatem Up | - |
| Comix Zone (Jul 12, 1995 prototype) | 12 July 1995 11:33:30 | Sega Mega Drive | Beatem Up | - |
| Comix Zone (Jun 1, 1995 prototype B) | 31 May 1995 23:27:12 | Sega Mega Drive | Beatem Up | - |
| Comix Zone (Jun 1, 1995 prototype C) | 1 June 1995 15:53:58 | Sega Mega Drive | Beatem Up | - |
| Comix Zone (Jun 1, 1995 prototype D) | 1 June 1995 19:53:42 | Sega Mega Drive | Beatem Up | - |
| Comix Zone (Jun 1, 1995 prototype) | 31 May 1995 15:49:04 | Sega Mega Drive | Beatem Up | - |
| Comix Zone (Jun 12, 1995 prototype) | 12 June 1995 12:38:40 | Sega Mega Drive | Beatem Up | - |
| Comix Zone (Jun 2, 1995 prototype B) | 2 June 1995 12:51:04 | Sega Mega Drive | Beatem Up | - |
| Comix Zone (Jun 2, 1995 prototype) | 2 June 1995 02:56:36 | Sega Mega Drive | Beatem Up | - |
| Comix Zone (Jun 28, 1995 prototype) | 28 June 1995 15:27:48 | Sega Mega Drive | Beatem Up | - |
| Comix Zone (Jun 3, 1995 prototype) | 3 June 1995 16:06:36 | Sega Mega Drive | Beatem Up | - |
| Comix Zone (Jun 5, 1995 prototype) | 5 June 1995 11:00:14 | Sega Mega Drive | Beatem Up | - |
| Comix Zone (Jun 6, 1995 prototype) | 6 June 1995 11:00:14 | Sega Mega Drive | Beatem Up | - |
| Comix Zone (Jun 9, 1995 prototype) | 9 June 1995 09:10:44 | Sega Mega Drive | Beatem Up | - |
| Comix Zone (May 26, 1995 prototype) | 26 May 1995 14:31:46 | Sega Mega Drive | Beatem Up | - |
| Comix Zone (May 30, 1995 prototype) | 30 May 1995 12:41:54 | Sega Mega Drive | Beatem Up | - |
| Command and Conquer: Commando (Jul 14, 1997 prototype) | 14 July 1997 12:06:20 | PlayStation | Adventure | ✓ |
| Commandos 2 (Nov 28, 2002 prototype) | 28 November 2002 | Game Boy Advance | Action | ✓ |
| Commandos: Strike Force (Feb 28, 2005 prototype) | 28 February 2005 19:11:24 | PlayStation 2 | FPS | - |
| Condemned 2: Bloodshot (Feb 3, 2008 prototype) | 3 February 2008 | Xbox 360 | Survival horror | - |
| Confidential Mission (Mar 3, 2001 prototype) | 3 March 2001 | Dreamcast | Shooter | - |
| Confidential Mission (Mar 9, 2001 prototype) | 9 March 2001 17:00:37 | Dreamcast | Shooter | - |
| Conflict: Global Terror (Aug 9, 2005 prototype) | 9 August 2005 09:18:41 | PlayStation 2 | Tactical shooter | - |
| Conflict: Vietnam (Prototype) | | Gizmondo | Tactical shooter | ✓ |
| Conker's Bad Fur Day (Aug 26, 2000 prototype) | 26 August 2000 | Nintendo 64 | Platform | - |
| Conker's Bad Fur Day (Oct 25, 2000 prototype) | 25 October 2000 | Nintendo 64 | Platform | - |
| Conspiracy: Weapons of Mass Destruction (Feb 6, 2005 prototype) | 7 February 2005 13:34:56 | PlayStation 2 | First-person shooter | - |
| Contact (Prototype) | | Nintendo DS | RPG | - |
| Contra (Sample Prototype) | | NES | side scrolling shooter | - |
| Contra (Test Prototype) | | NES | run-n-gun | - |
| Contra 4 (June 27, 2007 Prototype) | 27 June 2007 22:19:55 | Nintendo DS | run-n-gun | - |
| Contra Advance (Review Prototype) | | Game Boy Advance | run-n-gun | - |
| Contra III: The Alien Wars (Review Prototype) | | SNES | run-n-gun | - |
| Contra IV: The Alien Wars (Regional Intermediate Prototype) | | SNES | run-n-gun | - |
| Contra Spirits (Sample Prototype) | | SNES | run-n-gun | - |
| Contra: Legacy of War (Aug 23, 1996 prototype) | 23 August 1996 19:41:38 | PlayStation | Run-n-gun | - |
| Contra: Legacy of War (January 28, 1997 Prototype) | 28 January 1997 | Sega Saturn | run-n-gun | - |
| Contra: Shattered Soldier (Jul 1, 2002 prototype) | 1 July 2002 11:15:30 | PlayStation 2 | Run and gun | - |
| Controller Test Cartridge | | | Hardware Diagnostics | - |
| Cool Boarders 3 (Jul 1, 1998 prototype) | 1 July 1998 18:57:10 | PlayStation | Sports - Snowboarding | - |
| Cool Boarders Burrrn (Aug 19, 1999 prototype) | 19 August 1999 18:20:13 | Dreamcast | Sports - Snowboarding | - |
| Cool Boarders Burrrn (Jun 22, 1999 prototype) | 22 June 1999 19:57:34 | Dreamcast | Sports - Snowboarding | - |
| Cool Spot (prototype) | | Sega Mega Drive | Platform | - |
| Cooly Skunk (Prototype) | | SNES | Action | ✓ |
| Cosmic Carnage (Oct 11, 1994 prototype) | 11 October 1994 06:32:32 | Sega 32X | Fighter (2D) | - |
| Cosmic Carnage (Oct 13, 1994 prototype) | 13 October 1994 06:42:58 | Sega 32X | Fighter (2D) | - |
| Cosmic Carnage (Oct 4, 1994 prototype) | 4 October 1994 09:43:02 | Sega 32X | Fighter (2D) | - |
| Cosmic Carnage (Oct 5, 1994 prototype) | 5 October 1994 09:17:16 | Sega 32X | Fighter (2D) | - |
| Cosmic Carnage (Oct 7, 1994 prototype) | 7 October 1994 09:40:00 | Sega 32X | Fighter (2D) | - |
| Cosmic Carnage (Sep 21, 1994 prototype) | 26 September 1994 06:41:50 | Sega 32X | Fighter (2D) | - |
| Cosmic Carnage (Sep 26, 1994 prototype) | 27 September 1994 19:41:46 | Sega 32X | Fighter (2D) | - |
| Cosmic Carnage (Sep 28, 1994 prototype) | 3 October 1994 08:39:24 | Sega 32X | Fighter (2D) | - |
| Cosmic Carnage (Sep 6, 1994 prototype) | 6 September 1994 14:24:30 | Sega 32X | Fighter (2D) | - |
| Cosmos Chaos (prototype) | | Nintendo DS | Edutainment | - |
| Crank the Weasel (Prototype) | 2002 | PC | Action | ✓ |
| Crash 'n' Burn (Aug 25, 2004 prototype) | 25 August 2004 | PlayStation 2 | Racing, vehicular combat | - |
| Crash Bandicoot (Apr 8, 1996 prototype) | 29 February 1996 19:02:01 | PlayStation | Action | - |
| Crash Bandicoot (May 11, 1996 prototype) | 11 May 1996 | PlayStation | Action | - |
| Crash Bandicoot 2: Cortex Strikes Back (Sep 14, 1997 prototype) | 14 September 1997 | PlayStation | Action | - |
| Crash Bandicoot: The Wrath Of Cortex (Sep 21, 2001 prototype) | 21 September 2001 | PlayStation 2 | Platformer | - |
| Crash Bandicoot: Warped (Aug 15, 1998 prototype) | 15 August 1998 | PlayStation | Action | - |
| Crash Bandicoot: Warped (Jul 29, 1998 demo) | 29 July 1998 10:21:02 | PlayStation | Action | - |
| Crash Of The Titans (Pre-Production 1.0) | 8 August 2007 | PlayStation Portable | Platformer, beat 'em up | - |
| Crash Tag Team Racing (E3 prototype) | 24 May 2005 18:24:08 | PlayStation 2 | Racing | - |
| Crash Team Racing (Aug 5, 1999 prototype) | 5 August 1999 | PlayStation | Racing | - |
| Crash Team Racing (Sep 3, 1999 prototype) | 3 September 1999 | PlayStation | Racing | - |
| Crash Twinsanity (Jan 1, 1990 prototype) | 4 December 2003 | PlayStation 2 | Platformer | - |
| Crayola Crayons Create a World (Jun 14, 1994 prototype) | 14 June 1994 22:55:00 | Sega Pico | Educational | - |
| Crayola Crayons Create a World (Jun 23, 1994 prototype) | 23 June 1994 08:51:28 | Sega Pico | Educational | - |
| Crayola Crayons Create a World (Jun 30, 1994 prototype) | 1 July 1994 22:13:50 | Sega Pico | Educational | - |
| Crayola Crayons Create a World (Oct 11, 1994 prototype) | 11 October 1994 08:06:14 | Sega Pico | Educational | - |
| Crayola Crayons Create a World (Oct 12, 1994 prototype) | | Sega Pico | Educational | - |
| Crayola Crayons Create a World (Oct 6, 1994 prototype) | 6 October 1994 13:47:50 | Sega Pico | Educational | - |
| Crayola Crayons Create a World (Sep 26, 1994 prototype) | 26 September 1994 14:38:06 | Sega Pico | Educational | - |
| Crayon Shinchan Oekaki Note prototype | | Sega Pico | Educational | - |
| Crayon Shinchan Oekaki Note prototype B | | Sega Pico | Educational | - |
| Crayon Shinchan Oekaki Note prototype C | | Sega Pico | Educational | - |
| Crazy Faces (Prototype) | | Game Gear | Puzzle | ✓ |
| Crazy Frog Racer (Oct 18, 2005 prototype) | 18 October 2005 02:55:20 | PlayStation 2 | Racing | - |
| Crazy Taxi 2 (May 14, 2001 prototype) | 14 May 2001 18:31:21 | Dreamcast | Arcade | - |
| Crazy Taxi: Fare Wars (Jun 28, 2007 prototype) | 28 June 2007 | PlayStation Portable | Racing, action | - |
| Creation Demo (Oct 26, 1995 prototype) | 26 October 1995 07:04:00 | PC | Simulation | ✓ |
| Crime Patrol (Sep 25, 1996 prototype) | 25 September 1996 | Sega Saturn | FMV | ✓ |
| Crisis Zone (Aug 2, 2004 prototype) | 2 August 2004 | PlayStation 2 | Light gun shooter | - |
| Crisis Zone (Jun 18, 2004 prototype) | 18 June 2004 20:17:50 | PlayStation 2 | Rail shooter | - |
| Croc: Legend of the Gobbos (Aug 11, 1996 prototype) | 6 September 1996 15:00:00 | PlayStation | Adventure | - |
| Croc: Legend of the Gobbos (Feb 28, 1997 prototype) | 28 February 1997 12:00:00 | PlayStation | Adventure | - |
| Crossfire (Prototype) | | Sega Mega Drive | Shooting | - |
| Crusty Demons (Aug 23, 2005 prototype) | 23 August 2005 | Xbox | Racing | - |
| Crying Dragon (Prototype) | | Sega Mega Drive | RPG | ✓ |
| Crypt Killer (Jan 8, 1997 prototype) | 8 January 1997 04:44:12 | Sega Saturn | Rail Shooter | - |
| Crysis (Aug 1, 2011 prototype) | 1 August 2011 | Xbox 360 | FPS | - |
| Crysis (Jul 29, 2011 prototype) | 29 July 2011 | Xbox 360 | FPS | - |
| Crystal's Pony Tale (Jul 1, 1994 prototype) | 1 July 1994 07:22:54 | Sega Mega Drive | Action Platformer | - |
| Crystal's Pony Tale (Jul 12, 1994 prototype B) | 13 July 1994 05:28:42 | Sega Mega Drive | Action Platformer | - |
| Crystal's Pony Tale (Jul 12, 1994 prototype) | 12 July 1994 12:06:52 | Sega Mega Drive | Action Platformer | - |
| Crystal's Pony Tale (Jul 13, 1994 prototype) | 13 July 1994 09:54:40 | Sega Mega Drive | Action Platformer | - |
| Crystal's Pony Tale (Jul 15, 1994 prototype) | 15 July 1994 11:35:34 | Sega Mega Drive | Action Platformer | - |
| Crystal's Pony Tale (Jul 2, 1994 prototype) | 2 July 1994 10:07:08 | Sega Mega Drive | Action Platformer | - |
| Crystal's Pony Tale (Jul 3, 1994 prototype) | 5 July 1994 04:48:18 | Sega Mega Drive | Action Platformer | - |
| Crystal's Pony Tale (Jun 1, 1994 prototype) | 1 June 1994 06:08:16 | Sega Mega Drive | Action Platformer | - |
| Crystal's Pony Tale (Jun 10, 1994 prototype) | 10 June 1994 14:06:26 | Sega Mega Drive | Action Platformer | - |
| Crystal's Pony Tale (Jun 23, 1994 prototype) | 23 June 1994 11:25:08 | Sega Mega Drive | Action Platformer | - |
| Crystal's Pony Tale (Jun 28, 1994 prototype) | 28 June 1994 10:13:32 | Sega Mega Drive | Action Platformer | - |
| Crystal's Pony Tale (Jun 30, 1994 prototype) | 30 June 1994 08:10:50 | Sega Mega Drive | Action Platformer | - |
| Crystal's Pony Tale (Jun 6, 1994 prototype) | 6 June 1994 08:46:04 | Sega Mega Drive | Action Platformer | - |
| Crystal's Pony Tale (May 11, 1994 prototype) | 11 May 1994 19:33:02 | Sega Mega Drive | Action Platformer | - |
| Crystal's Pony Tale (May 19, 1994 prototype) | 19 May 1994 13:19:18 | Sega Mega Drive | Action Platformer | - |
| Crystal's Pony Tale (May 26, 1994 prototype) | 26 May 1994 16:03:22 | Sega Mega Drive | Action Platformer | - |
| Curse (Jun 26, 1990 prototype) | 26 June 1990 | Sega Mega Drive | Shooter | - |
| Cutthroat Island (Prototype) | | Game Gear | Action | - |
| Cutthroat Island (prototype) | | SNES | Platformer | - |
| Cyber Police ESWAT (Prototype A) | | Sega Master System | Action | - |
| Cyber Police ESWAT (Prototype B) | | Sega Master System | Action | - |
| Cyber Police ESWAT (Prototype C) | | Sega Master System | Action | - |
| Cybermorph (Early prototype) | 23 August 1993 | Atari Jaguar | Shooter | - |
| Cyborg Hunter (Prototype) | | Sega Master System | Arcade | - |
| DK King of Swing (prototype) | | Game Boy Advance | Platformer | - |
| DSP-1 Tech Demo | | SNES | Tech Demo | ✓ |
| Daffy Duck: The Marvin Missions (Prototype) | | SNES | Platformer | - |
| Daikatana (Apr 19, 2000 prototype) | 19 April 2000 | Game Boy Color | Role Playing | - |
| Dance Dance Revolution Extreme (May 10, 2004 prototype) | 10 May 2004 17:07:36 | PlayStation 2 | Music, Exercise | - |
| Dance Factory (Feb 5, 2006 prototype) | 5 February 2006 | PlayStation 2 | Music | - |
| Dancing Stage EuroMIX (Sep 1, 2000 prototype) | 1 September 2000 11:13:46 | PlayStation | Dancing | - |
| Dancing Stage Fusion (Jul 8, 2004 prototype) | 8 July 2004 19:29:26 | PlayStation 2 | Rhythm - Dancing | - |
| Dancing Stage Unleashed (Jul 1, 2003 prototype) | 1 July 2003 21:09:29 | Xbox | Rhythm - Dancing | - |
| Danny Sullivan's Indy Heat (Prototype) | | Sega Mega Drive | Racing | ✓ |
| Dante's Inferno (PC demo) | 28 November 1995 | Atari Jaguar CD | Adventure | ✓ |
| Dark Arms: Beast Busters (Prototype) | | Neo Geo Pocket Color | Role Playing | - |
| Dark Cloud 2 (Dec 26, 2002 08.12 prototype) | 26 December 2002 08:12:56 | PlayStation 2 | RPG | - |
| Dark Empire (Prototype) | | Game Boy Advance | Role playing | ✓ |
| Dark Guardian - Episode 1: Unknown Enemy (prototype) | 2001 | Atari Jaguar | | ✓ |
| Dark Kingdom (v0.55 prototype) | | SNES | Role playing | - |
| Dark Summit (E3 prototype) | | Xbox | Sports - Snowboarding | - |
| Dark Void (Nov 4, 2009 prototype) | 27 October 2009 | Xbox 360 | Third-person shooter, action-adventure | - |
| Darwin 4081 (Feb 21, 1990 prototype) | 21 February 1990 16:52:40 | Sega Mega Drive | Shooter | - |
| Dashin' Desperadoes (PAL prototype) | | Sega Mega Drive | Platform | - |
| Dave Mirra Freestyle BMX (Jun 28, 2000 prototype) | 28 June 2000 | PlayStation | Sports - Biking | - |
| Dave Mirra Freestyle BMX (Nov 2, 2000 prototype) | 2 November 2000 11:55:22 | Dreamcast | Sports - Bike | - |
| Dave Mirra Freestyle BMX (Oct 16, 2000 prototype) | 16 October 2000 02:02:14 | Dreamcast | Sports | - |
| Dave Mirra Freestyle BMX (Sep 20, 2000 prototype) | 20 September 2000 22:51:42 | Dreamcast | Sports - Bike | - |
| Dave Mirra Freestyle BMX (Sep 7, 2000 prototype) | 7 September 2000 | Dreamcast | Sports | - |
| David Robinson's Supreme Court (Apr 15, 1992 prototype) | 15 April 1992 11:41:38 | Sega Mega Drive | Sports | - |
| David Robinson's Supreme Court (Prototype) | | Game Gear | Sports - Basketball | ✓ |
| Daxter (Feb 10, 2006 prototype) | 10 February 2006 16:02:56 | PlayStation Portable | Action | - |
| Daytona USA (Feb 29, 2012 prototype) | 29 February 2012 | Xbox 360 | Racing | - |
| Daytona USA (Jul 28, 2012 prototype) | 28 July 2012 | Xbox 360 | Racing | - |
| Daytona USA 2001 (Feb 27, 2001 prototype) | 27 February 2001 19:08:50 | Dreamcast | Racing | - |
| Ddspgame (US Blue Disk) | | Nintendo 64DD | Demo | - |
| Dead Space (Aug 29, 2008 prototype) | 29 August 2008 | Xbox 360 | Survival horror | - |
| Dead Space (Aug 30, 2008 prototype) | 30 August 2008 | PlayStation 3 | Survival horror | - |
| Dead Space 2 (Nov 18, 2010 prototype) | 18 November 2010 | Xbox 360 | Survival horror | - |
| Dead Space 2 (Nov 8, 2010 prototype) | 8 November 2010 | Xbox 360 | Survival horror | - |
| Dead Space 3 (Aug 25, 2012 prototype) | 25 August 2012 | PlayStation 3 | Survival horror | - |
| Dead Zone (Prototype) | | FDS | First Person Adventure | - |
| Dead or Alive (Apr 22, 1998 prototype) | 22 April 1998 12:52:32 | PlayStation | Fighting | - |
| Dead or Alive (Feb 20, 1998 prototype) | 20 February 1998 | PlayStation | Fighting | - |
| Dead or Alive (Jan 10, 1998 prototype) | 10 January 1998 01:15:38 | PlayStation | Fighting | - |
| Dead or Alive (prototype) | 22 April 1998 | PlayStation | Fighting | - |
| Dead or Alive 1 Ultimate (Oct 12, 2004 prototype) | 12 October 2004 | Xbox | Fighting | - |
| Dead or Alive 2 (Jun 11, 2000 prototype) | 11 June 2000 22:36:47 | Dreamcast | Fighting | - |
| Dead or Alive 2 (Mar 10, 2000 prototype) | 10 March 2000 | Dreamcast | Fighting | - |
| Dead or Alive 3 (Oct 14, 2001 prototype) | 14 October 2001 17:04:04 | Xbox | Fighting | - |
| Dead to Rights (Apr 25, 2003 prototype) | 25 April 2003 11:39:40 | PlayStation 2 | Action | - |
| Deadlands (Jul 14, 2004 prototype) | 14 July 2004 13:55:50 | PlayStation 2 | Action | ✓ |
| Death By Degrees (Dec 29, 2004 prototype) | 29 December 2004 | PlayStation 2 | Action-adventure, beat 'em up | - |
| Death Duel (May 6, 1992 prototype) | 6 May 1992 14:30:12 | Sega Mega Drive | Fighting | - |
| Death Jr (Jul 22, 2005 prototype) | 22 July 2005 14:18:04 | PlayStation Portable | Action | - |
| Death Track (Prototype) | | Game Boy | Racing | ✓ |
| Deathtrap Dungeon (Jan 7, 1998 prototype) | 7 January 1998 17:00:46 | PlayStation | Action-adventure | - |
| Decathlon (Prototype) | | 3DO | Sports - Baseball | ✓ |
| Deep Fear (Jul 14, 1998 prototype) | 14 July 1998 18:37:54 | Sega Saturn | Survival Horror | ✓ |
| Deep Fighter (May 5, 2000 prototype) | 5 May 2000 16:31:46 | Dreamcast | Shoot 'em Up | - |
| Def Jam: Fight for NY (Aug 13, 2004 00.10 prototype) | 13 August 2004 07:10:53 | PlayStation 2 | Fighting | - |
| Defender 2000 (Prototype) | | Atari Jaguar | Shooter | - |
| Defenders of Oasis (Prototype) | | Game Gear | Role Playing | - |
| Deine eigene Modenschau (Prototype) | | Nintendo DS | Puzzle | - |
| Demolition Man CD (Prototype) | | Atari Jaguar CD | Action | ✓ |
| Demolition Racer: No Exit (Aug 2, 2000 prototype) | 2 August 2000 16:05:12 | Dreamcast | Racing | - |
| Demolition Racer: No Exit (Jul 10, 2000 prototype) | 10 July 2000 | Dreamcast | Racing | - |
| Demon's Crest (Localization prototype) | | SNES | Action | - |
| Demon's Crest (Prototype) | | SNES | Action | - |
| Dengeki PlayStation D21 (Demo disc) | 18 May 1999 20:17:54 | PlayStation | Demo | - |
| Dengeki Playstation D43 () | | PlayStation | | - |
| Dennis the Menace (prototype) | | SNES | Platformer | - |
| Densetsu no Kishi: Elrond (Prototype) | | NES | Action | - |
| Densetsu no Stafy (prototype) | | Game Boy Advance | Platformer | - |
| Densetsu no Stafy 2 (prototype) | | Game Boy Advance | Platformer | - |
| Densha de Go! 2 (Prototype) | | Neo Geo Pocket Color | Train Simulator | - |
| Derby Stallion 64 (Prototype) | | Nintendo 64 | Racing | - |
| Desert Demolition (Dec 12, 1994 prototype B) | 12 December 1994 17:47:14 | Sega Mega Drive | Action Platformer | - |
| Desert Demolition (Dec 12, 1994 prototype) | | Sega Mega Drive | Action Platformer | - |
| Desert Demolition (Dec 13, 1994 prototype) | 13 December 1994 14:58:06 | Sega Mega Drive | Action Platformer | - |
| Desert Demolition (Dec 14, 1994 prototype) | 14 December 1994 15:50:00 | Sega Mega Drive | Action Platformer | - |
| Desert Demolition (Dec 15, 1994 prototype) | 15 December 1994 16:13:00 | Sega Mega Drive | Action Platformer | - |
| Desert Demolition (Dec 16, 1994 prototype) | 16 December 1994 19:00:54 | Sega Mega Drive | Action Platformer | - |
| Desert Demolition (Dec 19, 1994 prototype) | 19 December 1994 13:16:20 | Sega Mega Drive | Action Platformer | - |
| Desert Demolition (Dec 6, 1994 prototype) | | Sega Mega Drive | Action Platformer | - |
| Desert Demolition (Dec 8, 1994 prototype) | 8 December 1994 14:52:08 | Sega Mega Drive | Action Platformer | - |
| Destroy All Humans! (Mar 12, 2004 prototype) | 12 March 2004 00:00:27 | Xbox | Action-adventure | - |
| Destruction Derby (Aug 17, 1995 prototype) | 17 August 1995 12:50:22 | PlayStation | Vehicular combat | - |
| Destruction Derby (Jul 31, 1995 prototype) | 31 July 1995 13:49:54 | PlayStation | Vehicular combat | - |
| Destruction Derby Arenas (Sep 4, 2003 prototype) | 4 September 2003 08:19:50 | PlayStation 2 | Action | - |
| Deuce (Jul 21, 2000 prototype) | 21 July 2000 | PlayStation | Adventure | ✓ |
| Deus Ex: Human Revolution (Apr 12, 2011 prototype) | 12 April 2011 | Xbox 360 | Action role-playing | - |
| Devil Dice (Apr 6, 1998 prototype) | 6 April 1998 13:12:00 | PlayStation | Action | - |
| Devil Dice (Jun 14, 1998 prototype) | 14 June 1998 00:31:42 | PlayStation | Action | - |
| Devil May Cry 3: Dante's Awakening (Jan 12, 2005 prototype) | 11 January 2005 22:37:52 | PlayStation 2 | Action-adventure | - |
| Devilish (Jan 16, 1992 prototype) | 16 January 1992 13:48:00 | Sega Mega Drive | Pinball | - |
| Dezaemon DD (Feb 23, 1998 prototype) | | Nintendo 64DD | Shoot em Up | ✓ |
| Diablo (Dec 12, 1997 prototype) | 12 December 1997 20:14:00 | PlayStation | Role playing | - |
| Dictionnaire Hachette Multimédia (Aug 31, 1994 prototype) | 31 August 1994 | Philips CD-i | Dictionary | - |
| Diddy Kong Pilot (2001 prototype) | | Game Boy Advance | Racing | ✓ |
| Diddy Kong Pilot (2003 prototype) | | Game Boy Advance | Racing | ✓ |
| Die Hard 64 (Mar 15, 2000 02.32 prototype) | 15 March 2000 02:32:10 | Nintendo 64 | FPS | ✓ |
| Die Hard 64 (Mar 15, 2000 02.36 prototype) | 15 March 2000 02:36:16 | Nintendo 64 | FPS | ✓ |
| Die Hard 64 (Mar 15, 2000 02.43 prototype) | 15 March 2000 02:43:12 | Nintendo 64 | FPS | ✓ |
| Digimon Rumble Arena 2 (Mar 5, 2003 prototype) | 5 March 2003 19:58:00 | PlayStation 2 | Fighting | - |
| Dino Hockey (Dec 18, 1990 prototype) | | NES | Sports - Hockey | ✓ |
| Dino Hockey (Prototype) | | NES | Sports - Hockey | ✓ |
| Dinobasher Starring Bignose the Caveman (Game Gear Prototype) | | Game Gear | Action | ✓ |
| Dinobasher Starring Bignose the Caveman (Master System Prototype) | | Sega Master System | Action | ✓ |
| Dinosaurs for Hire (Apr 26, 1993 prototype) | 26 April 1993 16:41:20 | Sega Mega Drive | Shooter | - |
| Dinosaurs for Hire (Apr 27, 1993 prototype) | 27 April 1993 17:29:20 | Sega Mega Drive | Shooter | - |
| Dinosaurs for Hire (May 2, 1993 prototype) | 2 May 1993 15:20:20 | Sega Mega Drive | Shooter | - |
| Disk One (ddspgame) | | Nintendo 64DD | Demo | - |
| Disney Fairies: Tinker Bell (prototype) | 28 October 2008 | Nintendo DS | Adventure | - |
| Disney's Dinosaur (Oct 3, 2000 prototype) | 3 October 2000 15:22:33 | Dreamcast | Adventure | - |
| Disney's Hide and Sneak (Dec 1, 2003 prototype) | 1 December 2003 | Nintendo GameCube | Action | - |
| Disney's Peter Pan: The Legend of Never Land (Dec 3, 2001 prototype) | 3 December 2001 | PlayStation 2 | | - |
| Disney's Stitch: Experiment 626 (Mar 28, 2002 prototype) | 28 March 2002 16:05:32 | PlayStation 2 | Action | - |
| Disney's Treasure Planet (Aug 1, 2002 prototype) | 1 August 2002 | PlayStation | Action-adventure | - |
| Dive Alert (Prototype) | | Neo Geo Pocket Color | Role Playing | - |
| Diver's Dream (Jan 14, 1999 prototype) | 14 January 1999 14:43:52 | PlayStation | Action Adventure | - |
| Divinity II (Sep 24, 2009 prototype) | 24 September 2009 | Xbox 360 | Action role-playing | - |
| DmC: Devil May Cry (Nov 19, 2012 prototype) | 19 November 2012 | PlayStation 3 | | - |
| DmC: Devil May Cry (Oct 19, 2012 prototype) | 19 October 2012 | Xbox 360 | | - |
| Dodger Gamecube Tech Demo | | Nintendo GameCube | Tech Demo | - |
| Dog's Life (Sep 12, 2003 prototype) | 12 September 2003 19:35:31 | PlayStation 2 | Action-review | - |
| Doki Doki Penguin Land: Uchuu Daibouken (Prototype) | | Sega Master System | Puzzle | - |
| Dolucky no Oekaki House prototype | | Sega Pico | Educational | - |
| Dominion (Aug 27 1992 prototype) | 27 August 1992 23:40:02 | Atari ST | Puzzle | ✓ |
| Donalds Gespensterjagd (Prototype) | | Sega Pico | | ✓ |
| Donkey Kong 64 (Demo) | | Nintendo 64 | Action | - |
| Donkey Kong Land III (Prototype) | | Game Boy | Action | - |
| Doom (Apr 10, 1996 Prototype) | | Sega Saturn | | - |
| Doom (Dec 1, 1994 prototype) | 1 October 1994 05:53:48 | Sega 32X | First Person Shooter | - |
| Doom (Oct 2, 1994 prototype) | 8 October 1994 15:25:14 | Sega 32X | First Person Shooter | - |
| Doom (Oct 8, 1994 - final) | 8 October 1994 09:29:28 | Sega 32X | First Person Shooter | - |
| Doom (Sep 14, 1994 prototype) | 14 September 1994 18:25:12 | Sega 32X | First Person Shooter | - |
| Doom (Sep 16, 1994 prototype) | 16 September 1994 15:23:42 | Sega 32X | First Person Shooter | - |
| Doom (Sep 21, 1994 prototype) | 21 September 1994 01:48:18 | Sega 32X | First Person Shooter | - |
| Doom (Sep 23, 1994 prototype) | 22 September 1994 22:37:06 | Sega 32X | First Person Shooter | - |
| Doom (Sep 25, 1994 prototype) | 24 September 1994 23:46:58 | Sega 32X | First Person Shooter | - |
| Doom (Sep 27, 1994 prototype) | 28 September 1994 03:30:48 | Sega 32X | First Person Shooter | - |
| Doom (Sep 6, 1994 prototype) | 7 September 1994 12:12:38 | Sega 32X | First Person Shooter | - |
| Doom (Sep 9, 1994 prototype) | 8 September 1994 13:20:30 | Sega 32X | First Person Shooter | - |
| Doom 3 (Jul 23, 2002 prototype) | 23 July 2002 13:14:36 | PC | FPS | - |
| Doom RR (Feb 15, 1995 prototype) | 15 February 1995 13:19:02 | Sega 32X | First Person Shooter | ✓ |
| Doom RR (Feb 21, 1995 prototype) | 21 February 1995 09:54:36 | Sega 32X | First Person Shooter | ✓ |
| Doom RR (Mar 7, 1995 prototype) | 7 March 1995 14:29:52 | Sega 32X | First Person Shooter | ✓ |
| Doom Troopers: Mutant Chronicles (Prototype A) | | SNES | Action | - |
| Doom Troopers: Mutant Chronicles (Prototype B) | | SNES | Action | - |
| Dot E Creator Contest | | | Misc | - |
| Double Dragon (NES prototype) | | NES | Action/Platform | - |
| Double Dragon Game Gear (Prototype) | | Game Gear | | - |
| Double Dragon II - The Revenge (Oct 18, 1991 prototype) | 18 October 1991 13:50:28 | Sega Mega Drive | Beat 'Em Up | - |
| Double Dragon II: The Revenge (sample) | | NES | Action/Beat-em-up | - |
| Double Dragon III: The Sacred Stones (Tradewest prototype) | | NES | Beat 'em up | - |
| Double Dragon V: The Shadow Falls (Jun 1994 prototype)) | June 1994 | Atari Jaguar | Beat em Up | - |
| Double Hawk (Prototype) | | Sega Master System | Shoot'em Up | - |
| Down the World: Mervil's Ambition (Prototype) | | SNES | Role Playing | - |
| Dr. Franken (Prototype) | | Game Gear | Action | ✓ |
| Dr. Mario (Apr 27, 1990 prototype) | 27 April 1990 | NES | Puzzle | - |
| Dr. Mario (Game Boy prototype) | | Game Boy | Puzzle | - |
| Dr. Mario (Prototype) | | NES | Puzzle | - |
| Dr. Muto (Feb 12, 2003 prototype) | 12 February 2003 14:56:01 | Nintendo GameCube | Action | - |
| Dr. Robotnik's Mean Bean Machine (Prototype B) | | Sega Mega Drive | Puzzle | - |
| Dr. Robotnik's Mean Bean Machine (Prototype) | | Sega Mega Drive | Puzzle | - |
| Drac's Night Out (Prototype) | | NES | Platform | ✓ |
| Draconus: Cult of the Wyrm (Jan 27, 2000 prototype) | 27 January 2000 18:51:28 | Dreamcast | Hack and slash | - |
| Dragon Ball Z Budokai Tenkaichi 2 (Aug 1, 2006 prototype) | 1 August 2006 | PlayStation 2 | Fighting | - |
| Dragon Ball Z: Budokai 3 (Sep 27, 2004 prototype) | 28 September 2004 04:49:11 | PlayStation 2 | Fighting | - |
| Dragon Ball Z: Super Butouden (Prototype) | | SNES | Fighting | - |
| Dragon Sword 64 (Aug 25, 1999 prototype) | 25 August 1999 | Nintendo 64 | Adventure | ✓ |
| Dragon Sword 64 (Prototype) | | Nintendo 64 | Adventure | ✓ |
| Dragon Warrior VII (Sep 14, 2001 prototype) | 14 September 2001 13:21:40 | PlayStation | Role Playing | - |
| Dragon's Heaven (Prototype) | | Neo Geo | Fighting | ✓ |
| Dragon's Lair II (Jun 22, 1994 prototype) | 22 June 1994 | Philips CD-i | FMV | - |
| Dragon's Lair: The Adventure Continues (Prototype) | | Sega Mega Drive | Arcade | ✓ |
| Dragon: The Bruce Lee Story (Oct 6, 1994 prototype) | 6 October 1994 15:01:00 | Atari Jaguar | Fighting | - |
| Dragon: The Bruce Lee Story (Prototype) | | Game Gear | Action | - |
| Dragon: The Bruce Lee Story (Sep 26, 1994 prototype) | 26 September 1994 19:53:00 | Atari Jaguar | Fighting | - |
| Drakan: The Ancients' Gates (Nov 27, 2001 prototype) | 27 November 2001 | PlayStation 2 | | - |
| Drawing & Painting (Feb 24, 1994 prototype) | 24 February 1994 | Philips CD-i | FMV | - |
| Dreamcast Promotion Disk (Oct 22, 1998 build) | 22 October 1998 | Dreamcast | Promotional | - |
| Dreamworld Pogie (Prototype) | | NES | Platform | ✓ |
| Driven (Prototype) | | Nintendo GameCube | Racing | - |
| Driver 2: Back on the Streets (Aug 15, 2000 prototype) | 15 August 2000 19:36:16 | PlayStation | Racing | - |
| Driver 2: Back on the Streets (Oct 1, 2000 prototype) | 1 October 2000 21:47:57 | PlayStation | Racing | - |
| Driver 3 (Feb 5, 2004 prototype) | 5 February 2004 | Xbox | Action-adventure | - |
| Driver: You are the Wheelman (Apr 11, 1999 prototype) | 11 April 1999 | PlayStation | Racing | - |
| Driver: You are the Wheelman (Feb 10, 1999 prototype) | 10 February 1999 16:14:16 | PlayStation | Racing | - |
| Driver: You are the Wheelman (Mar 31, 1999 prototype) | 31 March 1999 20:57:14 | PlayStation | Racing | - |
| Drome Racers (Jul 11, 2003 prototype) | 11 July 2003 | Xbox | Racing | ✓ |
| Drug Wars (Dec 30, 1999 prototype) | 30 December 1999 | Philips CD-i | FMV | - |
| Druid: Kyoufu no Tobira (Dec 1987 prototype) | December 1987 | FDS | Role-Playing, Action RPG | - |
| Duck Dodgers Starring Daffy Duck (Prototype) | | Nintendo 64 | Action | - |
| DuckTales (Prototype) | 1989 | NES | | - |
| DuckTales 2 (PAL Prototype A) | | NES | Platform | - |
| DuckTales 2 (PAL Prototype B) | | NES | Platform | - |
| Duke Nukem (Sep 18, 1997 prototype) | 18 September 1997 13:44:08 | Sega Saturn | First Person Shooter | - |
| Duke Nukem 64 (Prototype) | | Nintendo 64 | First person shooter | - |
| Duke Nukem: Time to Kill (Jun 12, 1998 prototype) | 12 June 1998 18:35:12 | PlayStation | FPS | - |
| Duke Nukem: Total Meltdown (Sep 4, 1997 prototype) | 4 September 1997 09:39:44 | PlayStation | FPS | - |
| Dune II: The Battle for Arrakis (Jan 11, 1994 prototype) | 11 January 1994 | Sega Mega Drive | Real time strategy | - |
| Dune: Ornithopter Assault (Prototype) | | Game Boy Advance | Shoot em Up | ✓ |
| Dungeon Siege II (Mar 22, 2005 prototype) | 22 March 2005 | PC | Action role-playing | - |
| Dungeon Siege III (Mar 9, 2011 prototype) | 9 March 2011 | Xbox 360 | Action role-playing | - |
| Dungeon Siege III (Nov 16, 2010 prototype) | 16 November 2010 | PlayStation 3 | Action role-playing | - |
| Dungeons & Dragons - Warriors of the Eternal Sun (Apr 28, 1992 build) | 28 April 1992 13:10:32 | Sega Mega Drive | Roleplaying | - |
| Dyna Brothers 2 Special | | Sega Mega Drive | Action | - |
| Dynamite Cop (Jun 29, 1999 prototype) | 29 June 1999 | Dreamcast | Beat 'em up | - |
| Dynamite Duke (Jun 21, 1990 prototype) | 21 June 1990 17:29:28 | Sega Mega Drive | Shooter | - |
| Dynamite Headdy (Jul 1, 1994 prototype) | 1 July 1994 14:07:54 | Game Gear | Action Platformer | - |
| Dynamite Headdy (Jul 5, 1994 prototype) | 5 July 1994 10:47:42 | Game Gear | Action Platformer | - |
| Dynamite Headdy (Jul 6, 1994 prototype) | 6 July 1994 16:20:20 | Game Gear | Action Platformer | - |
| Dynamite Headdy (Jun 14, 1994 prototype) | 15 June 1994 06:03:14 | Sega Mega Drive | Action Platformer | - |
| Dynamite Headdy (Jun 15, 1994 prototype) | 15 June 1994 12:25:32 | Game Gear | Action Platformer | - |
| Dynamite Headdy (Jun 16, 1994 prototype) | 16 June 1994 05:54:34 | Sega Mega Drive | Action Platformer | - |
| Dynamite Headdy (Jun 22, 1994 prototype) | 22 June 1994 11:47:34 | Sega Mega Drive | Action Platformer | - |
| Dynamite Headdy (Jun 24, 1994 prototype) | 24 June 1994 14:02:54 | Sega Mega Drive | Action Platformer | - |
| Dynasty Warriors (Jul 15, 1997 prototype) | 15 July 1997 11:33:52 | PlayStation | Fighting | - |
| Dynasty Warriors 5 (Mar 23, 2005 prototype) | 24 March 2005 10:19:42 | PlayStation 2 | Turn Based General | - |
| DynoBlaze (Prototype) | | Sega Mega Drive | Action | ✓ |
| EJay Club World: The Music Making Experience (Jun 27, 2002 prototype) | 27 June 2002 16:56:03 | PlayStation 2 | Music | - |
| ESPN International Track & Field (Sep 22, 2000 prototype) | 22 September 2000 19:09:44 | PlayStation 2 | Sports - Misc | - |
| ESPN MLS ExtraTime 2002 (Jan 31, 2002 prototype) | 31 January 2002 | Nintendo GameCube | Sports - Soccer | - |
| Earnest Evans (Apr 19, 1994 prototype) | 19 April 1994 11:23:14 | Sega Mega Drive | Platformer | - |
| Earth Command (Sep 29, 1994 prototype) | 29 September 1994 | Philips CD-i | FMV | - |
| EarthBound (Mar 27, 1995 prototype) | 27 March 1995 | SNES | Role-playing | - |
| EarthBound (prototype) | | NES | RPG | - |
| Earthworm Jim (Aug 19, 1994 prototype) | 19 August 1994 | SNES | Action | - |
| Earthworm Jim (Aug 4, 1994 GameMaster prototype) | 4 August 1994 | SNES | Action | - |
| Earthworm Jim (Jul 28, 1994 prototype) | 28 July 1994 | Sega Mega Drive | Action | - |
| Earthworm Jim 2 (Apr 24, 1995 prototype) | 24 April 1995 | SNES | Action | - |
| Earthworm Jim 2 (Aug 24, 1995 prototype) | 24 August 1995 | Sega Mega Drive | Action | - |
| Earthworm Jim 2 (Dec 29, 1995 prototype) | 29 December 1995 17:25:36 | Sega Saturn | Adventure | - |
| Earthworm Jim 2 (Jan 5, 1996 prototype) | 5 January 1996 18:29:07 | Sega Saturn | Adventure | - |
| Earthworm Jim 2 (SNEAKERS Prototype) | | SNES | Action | - |
| Earthworm Jim 2 (Sep 7, 1995 prototype) | 7 September 1995 | SNES | Action | - |
| Earthworm Jim 2 (Test Version) | | NES | Action | - |
| Ecco 3D (E3 Demo) | 8 May 1999 11:31:37 | Dreamcast | Adventure | - |
| Ecco 3D (May 6, 1999 prototype) | 6 May 1999 21:07:46 | Dreamcast | Adventure | - |
| Ecco II Sentinels of the Universe (Feb 19, 2001 prototype) | 19 February 2001 12:41:28 | Dreamcast | Adventure | ✓ |
| Ecco II Sentinels of the Universe (prototype) | | Dreamcast | Adventure | ✓ |
| Ecco the Dolphin (Apr 21, 1993 prototype) | 21 April 1993 | Sega Mega Drive | Adventure | - |
| Ecco the Dolphin (EPROM 20 prototype) | | Game Gear | Adventure | - |
| Ecco the Dolphin (Jun 14, 1993 prototype) | 14 June 1993 | Game Gear | Adventure | - |
| Ecco the Dolphin (Jun 29, 1993 build) | 29 June 1993 10:22:04 | Sega Mega Drive | Adventure | - |
| Ecco the Dolphin 32x (CinePak Demo) | | Sega 32X | Tech Demo | ✓ |
| Ecco the Dolphin: Defender of the Future (Apr 17, 2000 2PM prototype) | 17 April 2000 14:10:10 | Dreamcast | Adventure | - |
| Ecco the Dolphin: Defender of the Future (Apr 17, 2000 7AM prototype) | 17 April 2000 07:07:58 | Dreamcast | Adventure | - |
| Ecco the Dolphin: Defender of the Future (Apr 19, 2000 prototype) | 19 April 2000 21:52:12 | Dreamcast | Adventure | - |
| Ecco the Dolphin: Defender of the Future (Apr 21, 2000 prototype) | 21 April 2000 21:05:24 | Dreamcast | Adventure | - |
| Ecco the Dolphin: Defender of the Future (Apr 8, 2000 prototype) | 7 April 2000 22:26:40 | Dreamcast | Adventure | - |
| Ecco the Dolphin: Defender of the Future (Feb 17, 2000 prototype) | 17 February 2000 14:55:04 | Dreamcast | Adventure | - |
| Ecco the Dolphin: Defender of the Future (Jan 26, 2000 prototype) | 26 January 2000 05:22:26 | Dreamcast | Adventure | - |
| Ecco the Dolphin: Defender of the Future (Jul 6, 2000 build) | 6 July 2000 20:11:00 | Dreamcast | Adventure | - |
| Ecco the Dolphin: Defender of the Future (Nov 23, 1999 prototype) | 23 November 1999 12:38:48 | Dreamcast | Adventure | - |
| Ecco the Dolphin: Defender of the Future (Nov 7, 2001 prototype) | 7 November 2001 16:55:48 | PlayStation 2 | Action | - |
| Ecco: The Tides of Time (Apr 13, 1994 prototype) | 13 April 1994 16:32:42 | Sega Mega Drive | Action Adventure | - |
| Ecco: The Tides of Time (Apr 29, 1994 prototype) | 4 May 1994 15:38:54 | Sega Mega Drive | Action Adventure | - |
| Ecco: The Tides of Time (Early prototype) | | Sega Mega Drive | Action Adventure | - |
| Ecco: The Tides of Time (prerelease) | | Sega CD | Action Adventure | - |
| Ed, Edd n Eddy: The Mis-Edventures (September 6, 2005 build) | 6 September 2005 17:28:18 | PlayStation 2 | Platformer | - |
| Eddie’s Puzzle Time (Prototype) | | Game Boy | Puzzle | ✓ |
| Eggerland: Souzou e no Tabidachi (Prototype) | | FDS | Puzzle | - |
| Elebits: The Adventures of Kai and Zero (Prototype) | | Nintendo DS | Action | - |
| Enclave (Jun 5, 2002 prototype) | 5 June 2002 | Xbox | Action | - |
| Enthusia Professional Racing (Jan 16, 2005 prototype) | 16 January 2005 12:33:09 | PlayStation 2 | Racing | - |
| Escape From Mars Starring Taz (Apr 18, 1994 prototype) | 23 April 1994 07:20:54 | Sega Mega Drive | Action Platformer | - |
| Escape From Mars Starring Taz (Jul 6, 1994 prototype) | 10 July 1994 15:21:52 | Sega Mega Drive | Action Platformer | - |
| Escape From Mars Starring Taz (Jun 10, 1994 prototype) | 10 June 1994 17:05:34 | Sega Mega Drive | Action Platformer | - |
| Escape From Mars Starring Taz (Jun 14, 1994 prototype) | 14 June 1994 06:52:48 | Sega Mega Drive | Action Platformer | - |
| Escape From Mars Starring Taz (Jun 18, 1994 prototype A) | 18 June 1994 08:52:36 | Sega Mega Drive | Action Platformer | - |
| Escape From Mars Starring Taz (Jun 2, 1994 prototype) | 3 June 1994 05:51:00 | Sega Mega Drive | Action Platformer | - |
| Escape From Mars Starring Taz (Jun 20, 1994 prototype) | 20 June 1994 14:13:38 | Sega Mega Drive | Action Platformer | - |
| Escape From Mars Starring Taz (Jun 24, 1994 prototype) | 24 June 1994 05:19:18 | Sega Mega Drive | Action Platformer | - |
| Escape From Mars Starring Taz (Jun 7, 1994 prototype) | 7 June 1994 05:27:54 | Sega Mega Drive | Action Platformer | - |
| Escape From Mars Starring Taz (Mar 9, 1994 prototype) | 9 March 1994 12:57:06 | Sega Mega Drive | Action Platformer | - |
| Escape From Mars Starring Taz (May 18, 1994 prototype) | 18 May 1994 17:14:06 | Sega Mega Drive | Action Platformer | - |
| Escape From Mars Starring Taz (May 23, 1994 prototype) | 23 May 1994 15:11:20 | Sega Mega Drive | Action Platformer | - |
| Escape From Mars Starring Taz (May 9, 1994 prototype) | 11 May 1994 12:31:44 | Sega Mega Drive | Action Platformer | - |
| Estpolis Denki II (Jul 18, 1994 prototype) | 18 July 1994 | SNES | Role Playing | - |
| Eternal Champions (Nov 17, 1993 prototype J) | 17 November 1993 14:03:50 | Sega Mega Drive | Fighter (2D) | - |
| Eternal Champions (Nov 17, 1993 prototype) | 17 November 1993 14:03:50 | Sega Mega Drive | Fighter (2D) | - |
| Eternal Champions (Prototype) | | Sega Mega Drive | Fighting | - |
| European Club Soccer (Oct 25, 1991 prototype) | 25 October 1991 16:40:04 | Sega Mega Drive | Sports | - |
| European Super League (Dec 18, 2000 prototype) | 18 December 2000 17:48:46 | Dreamcast | Sports - Soccer | - |
| Evergrace (Nov 9, 2000 prototype) | 9 November 2000 11:22:14 | PlayStation 2 | Role playing | - |
| Evolve (Sep 28, 2012 prototype) | 28 September 2012 17:55:00 | Xbox 360 | First-person shooter | ✓ |
| Excitebike 64 (Demo) | | Nintendo 64 | Racing | - |
| Exile (Dec 13, 1991 build) | 13 December 1991 16:33:12 | Sega Mega Drive | Roleplaying | - |
| Explosion Royale (Jun 3, 2003 prototype) | 3 June 2003 14:35:50 | PlayStation 2 | Action | ✓ |
| Eye of Judgment: Legends (Oct 22, 2009 prototype) | 22 October 2009 | PlayStation Portable | | - |
| EyeToy: Kinetic Combat (Jun 13, 2006 prototype) | 13 June 2006 | PlayStation 2 | | - |
| EyeToy: Play (Mar 19, 2003 prototype) | 19 March 2003 15:06:44 | PlayStation 2 | Minigame | - |
| F-1 Race (Prototype) | | NES | Racing | - |
| F-1 World Grand Prix (PAL prototype) | | Nintendo 64 | Racing | - |
| F-1 World Grand Prix (Prototype) | | Game Boy Color | Racing | - |
| F-15 Strike Eagle II (Jul 13, 1992 prototype) | 13 July 1992 | Sega Mega Drive | Flight Simulator | - |
| F-22 Interceptor (Sep 17, 1991 build) | 17 September 1991 11:36:04 | Sega Mega Drive | Flight Simulator | - |
| F.A. Premier League Stars (Nov 1, 1999 prototype) | 1 November 1999 14:56:08 | PC | Sports | - |
| F.A. Premier League Stars (Nov 23, 1999 prototype and source code) | 23 November 1999 14:25:50 | PC | Sports | - |
| F.A. Premier League Stars (Oct 12, 1999 prototype) | 12 October 1999 11:27:51 | PC | Sports | - |
| F.A. Premier League Stars 2001 (Apr 17, 2000 prototype) | 17 April 2000 14:01:35 | PlayStation | Sports | - |
| F.A. Premier League Stars 2001 (Jul 28, 2000 prototype) | 28 July 2000 21:57:53 | PlayStation | Sports | - |
| F.A. Premier League Stars 2001 (May 23, 2000 prototype) | 23 May 2000 12:07:21 | PlayStation | Sports | - |
| F.A. Premier League Stars 2001 (May 9, 2000 prototype) | 9 May 2000 14:32:16 | PC | Sports | - |
| F1 Circus MD (Dec 28, 1991 prototype) | 28 December 1991 13:29:16 | Sega Mega Drive | Racing | - |
| F1 Racing Championship (May 30, 2000 prototype) | 30 May 2000 11:07:11 | Dreamcast | Racing | - |
| F1 Racing Championship (Nov 14, 2000 prototype) | 14 November 2000 18:07:58 | PlayStation 2 | Racing | - |
| F1 World Grand Prix (Sep 3, 1999 prototype) | 3 September 1999 17:13:26 | Dreamcast | Racing | - |
| F1 World Grand Prix II (Jul 28, 2000 prototype) | 28 July 2000 00:18:24 | Dreamcast | Racing | - |
| F1 World Grand Prix II (prototype) | | Dreamcast | Racing | - |
| F1: World Championship Edition (US prototype) | | Sega Mega Drive | Racing | ✓ |
| F355 Challenge (Apr 12, 2000 prototype) | 12 April 2000 | Dreamcast | Racing | - |
| F355 Challenge (Aug 21, 2000 prototype) | 21 August 2000 13:50:48 | Dreamcast | Racing | - |
| F355 Challenge (May 1, 2000 prototype) | 1 May 2000 18:53:26 | Dreamcast | Racing | - |
| FIFA Football 2005 (Oct 4, 2004 prototype) | 4 October 2004 | N-Gage | Sports - Football | - |
| FIFA Soccer 06 (Aug 5, 2005 prototype) | 5 August 2005 | PlayStation 2 | Sports | - |
| FIFA Soccer 06 (Jul 12, 2005 prototype) | 12 July 2005 | PlayStation 2 | Sports | - |
| FMC Disk Card Checker (1.3) | | | Hardware Diagnostics | - |
| FUEL (Aug 26, 2006 prototype) | 26 August 2006 | Xbox | Racing | ✓ |
| FZ35 Bios (Japanese) | | | BIOS | ✓ |
| FaceBreaker (Jun 8, 2008 prototype) | 8 June 2008 | Xbox 360 | Sports | - |
| Fahrenheit (May 19, 2005 prototype) | 19 May 2005 08:10:36 | Xbox | Adventure | - |
| Falcon (Prototype) | | SNES | Shooting | ✓ |
| Famicom Mini Collection (prototype) | | Game Boy Advance | Action | ✓ |
| Family Games II Junk Food Jive (Jun 12, 1995 prototype) | 12 June 1995 | Philips CD-i | FMV | - |
| Fantastic Parodius: Pursue the Glory of the Past (Aug 5, 1994 prototype) | 5 August 1994 | SNES | Shoot'em Up | - |
| Fantasy Star Soldier (Localization prototype) | | TurboGrafx-CD | Shoot 'em up | - |
| Fantasy Zone (REV01 prototype) | | Sega Master System | Shooter | - |
| Far Cry: Instincts (Aug 5, 2005 prototype) | 8 August 2005 | Xbox | FPS | - |
| Far Cry: Instincts (Sep 1, 2005 prototype) | 1 September 2005 | Xbox | FPS | - |
| Fatal Frame II: Crimson Butterfly (Feb 6, 2004 prototype) | 6 February 2004 13:48:44 | PlayStation 2 | Survival horror | - |
| Fatal Fury Special (Jan 13, 1995 prototype) | 13 January 1995 11:55:17 | Sega CD | Fighting | - |
| Felix the Cat (Prototype) | | Game Boy | Action | - |
| Ferox (Jul 29, 1997 prototype) | 29 July 1997 16:56:52 | Sega Saturn | Puzzle | ✓ |
| Field Commander (Nov 30, 2005 prototype) | 30 November 2005 | PlayStation Portable | | - |
| Fight Night Round 3 (Dec 21, 2005 prototype - Debug) | 21 December 2005 05:49:42 | PlayStation Portable | Fighting | - |
| Fight for Life (Mar 22, 1995 prototype) | 22 March 1995 | Atari Jaguar | Fighting | - |
| Fight for Life (Prototype) | | Atari Jaguar | Fighting | - |
| Fight for Life (Sep 7, 1995 prototype) | 7 September 1995 | Atari Jaguar | Fighting | - |
| Fighter Command (Prototype) | | Atari 2600 | Flight Simulator | ✓ |
| Fighter Maker (Oct 7, 1999 prototype) | 7 October 1999 00:08:19 | PlayStation | Fighting | - |
| Fighters Megamix (Apr 8, 1997 prototype) | 3 April 1997 14:14:50 | Sega Saturn | Fighting | - |
| Fighting Force 2 (Dec 2, 1999 prototype) | 2 December 1999 02:02:18 | Dreamcast | Beat em Up | - |
| Fighting Vipers (Sep 6, 1996 prototype) | 6 September 1996 11:31:10 | Sega Saturn | Fighting | - |
| Fighting Vipers 2 (Dec 25, 2000 prototype) | 25 December 2000 | Dreamcast | Fighting | - |
| Fighting Vipers 2 (Oct 8, 2000 prototype) | 8 October 2000 18:08:30 | Dreamcast | Fighting | - |
| Final Blow (Jan 16, 1990 prototype) | 16 January 1990 17:39:04 | Sega Mega Drive | Fighting | - |
| Final Fantasy (Prototype) | | NES | Role-playing | - |
| Final Fantasy Crystal Chronicles: Ring of Fates (demo) | | Nintendo DS | | - |
| Final Fantasy IX (Sep 6, 2000 prototype) | 6 September 2000 20:30:00 | PlayStation | Role Playing | - |
| Final Fantasy X (Sep 28, 2001 prototype) | 28 September 2001 19:40:00 | PlayStation 2 | Role Playing | - |
| Final Fantasy XII (Jul 21, 2006 build) | 21 July 2006 | PlayStation 2 | Role Playing | - |
| Final Fight CD (Apr 23, 1993 prototype) | 23 April 1993 22:44:32 | Sega CD | Beat 'em Up | - |
| Final Set | | SNES | Sports | - |
| Fire & Ice (Prototype) | | Sega Master System | | ✓ |
| Fire Emblem: Rekka no Ken (Feb 19, 2003 prototype) | 19 February 2003 | Game Boy Advance | Tactical | - |
| Fire Emblem: Rekka no Ken (Feb 6, 2003 prototype) | 6 February 2003 | Game Boy Advance | Tactical | - |
| Fire Emblem: The Binding Blade (prototype) | | Game Boy Advance | Role-playing | - |
| Flash Point (Prototype) | | Sega Mega Drive | Puzzle | ✓ |
| Flashback (Dec 21, 1994 prototype) | 21 December 1994 | Philips CD-i | Cinematic platformer | - |
| Flashback: The Quest for Identity (Jan 5, 1995 prototype) | 5 January 1995 | Philips CD-i | Action | - |
| Flashback: The Quest for Identity (Jul 4, 1995 prototype) | 4 July 1995 | Philips CD-i | Action | - |
| FlatOut 2 (Apr 4, 2006 prototype) | 4 April 2006 | Xbox | Racing | - |
| FlatOut Head On (Dec 11, 2007 prototype) | 11 December 2007 17:17:34 | PlayStation Portable | Racing | - |
| Fleet: Shiva's Gate (May 21, 2002 prototype) | 21 May 2002 | PlayStation 2 | Real-time strategy | ✓ |
| Flux (Apr 25, 1995 prototype) | 25 April 1995 | Sega Mega Drive | Music | - |
| Ford Racing: Off Road (Jan 11, 2008 prototype) | 11 January 2008 17:38:25 | PlayStation Portable | Racing | - |
| Formula One 05 (Apr 6, 2005 prototype) | 6 April 2005 11:03:59 | PlayStation 2 | Racing | - |
| Formula One 06 (Jun 15, 2006 prototype) | 15 June 2006 | PlayStation Portable | Sim racing | - |
| Formula One 06 (Jun 2, 2006 prototype) | 2 June 2006 11:44:54 | PlayStation 2 | Racing | - |
| Formula One 06 (Jun 21, 2006 prototype) | 21 June 2006 | PlayStation 2 | Sim racing | - |
| Formula One 99 (Aug 12, 1999 prototype) | 12 August 1999 17:51:01 | PlayStation | Racing | - |
| Forza Motorsport (Mar 5, 2005 prototype) | 5 March 2005 | Xbox | Racing | - |
| Frame Gride (March 19, 1999 prototype) | 19 March 1999 | Dreamcast | Fighting | - |
| Freak Boy (Prototype) | | Nintendo 64 | Action | ✓ |
| Freaky Flyers (May 28, 2003 prototype) | 28 May 2003 | Xbox | Racing | - |
| Freedom Fighters (Jul 15, 2003 prototype) | 15 July 2003 03:56:53 | Xbox | Third Person Shooter | - |
| Freestyle Scooter (prototype) | | Dreamcast | Sports | - |
| Frog Dude (Prototype) | 10 January 1993 | Sega Mega Drive | Platform | ✓ |
| Frogger (Prototype) | | Amstrad CPC | Action | ✓ |
| Frogger (Sep 3, 1997 prototype) | 3 September 1997 17:29:52 | PC | Action | - |
| Frogger 2: Swampy's Revenge (Milestone 4 prototype) | | Nintendo 64 | Action | ✓ |
| Frogger 2: Swampy's Revenge (Prototype) | | Nintendo 64 | Action | ✓ |
| Frogger Game Gear (Prototype) | | Game Gear | Action | ✓ |
| Frogger: The Great Quest (Oct 16 2001, US Prototype) | 16 October 2001 | PlayStation 2 | Platform | - |
| Front Mission 3 (prototype) | 14 December 1999 | PlayStation | | - |
| Full Spectrum Warrior (Jan 29, 2004 prototype) | 29 January 2004 01:08:59 | Xbox | Real-time tactics | - |
| Full Spectrum Warrior (Mar 22, 2005 prototype) | 22 March 2005 13:57:54 | PlayStation 2 | Real Time Strategy | - |
| Full Spectrum Warrior 2: Ten Hammers (Dec 14, 2005 prototype) | 14 December 2005 22:40:25 | Xbox | Real-time tactics | - |
| Fullmetal Alchemist and the Broken Angel (Jul 14, 2004 prototype) | 15 July 2004 12:28:10 | PlayStation 2 | Action role-playing game | - |
| Fur Fighters (Jun 12, 2000 prototype) | 12 June 2000 14:02:51 | Dreamcast | Fighting | - |
| Fur Fighters (Jun 2, 2000 prototype) | 2 June 2000 13:31:57 | Dreamcast | Fighting | - |
| Future Tactics: The Uprising (May 1, 2003 prototype) | 1 May 2003 12:20:12 | PlayStation 2 | Tactical shooter | - |
| G Darius (May 27, 1998 prototype) | 27 May 1998 | PlayStation | Shoot 'Em Up | - |
| GP Rider (Jan 4, 1994 prototype) | 4 January 1994 18:15:54 | Game Gear | Racer | - |
| GPU26 2600 Emulator | 13 October 1995 | | Emulator | ✓ |
| GT 64: Championship Edition (May 25, 1998 prototype) | 25 May 1998 | Nintendo 64 | Racing | - |
| Gain Ground (Jul 27, 1990 prototype) | 27 July 1990 10:01:22 | Sega Mega Drive | Shooter | - |
| Gain Ground (Prototype) | | Sega Master System | Action | - |
| Gakken no Obenkyou Soft Tasizan Hikizan prototype | | Sega Pico | Educational | - |
| Galerians (Aug 20, 1999 prototype) | 20 August 1999 | PlayStation | Survival horror | - |
| Galleon (GameCube Prototype) | | Nintendo GameCube | Adventure | ✓ |
| Game Boy Advance BIOS (Debug build) | | Game Boy Advance | BIOS | - |
| Ganbare Goemon 3: Shishi Juurokubei no Karakuri Manjigatame (Prototype) | | SNES | Adventure | - |
| Gangs of London (Jun 5, 2006 prototype) | 5 June 2006 15:43:17 | PlayStation Portable | Action | - |
| Gauntlet (100% Complete Nintendo DS prototype) | | Nintendo DS | Action | ✓ |
| Gauntlet (CENSOR prototype) | | Sega Mega Drive | Role playing | - |
| Gauntlet (Nintendo DS demo) | | Nintendo DS | Action | - |
| Gauntlet Legends (May 26, 2000 prototype) | 26 May 2000 12:24:24 | Dreamcast | Role playing | - |
| Gauntlet: Dark Legacy (Mar 19, 2001 build) | 19 March 2001 | PlayStation 2 | | - |
| Geist Force (Apr 6, 1999 prototype) | 6 April 1999 | Dreamcast | Shooting | ✓ |
| Gekido (Sep 4, 2000 prototype) | 4 September 2000 11:43:18 | Game Boy Color | Beat 'em Up | ✓ |
| Gen 13 (Mar 20, 1997 prototype) | 20 March 1997 23:26:26 | PlayStation | Tech Demo | ✓ |
| Getsu Fuuma Den (prototype) | | NES | Action-Adventure | - |
| Gex (Nov 14, 1995 prototype) | 14 November 1995 13:35:34 | PlayStation | Platformer | - |
| Gex 3: Deep Cover Gecko (Dec 30, 1998 prototype) | 30 December 1998 14:48:20 | PlayStation | Action | - |
| Gex 3: Deep Cover Gecko (Feb 25, 1999 prototype) | 25 February 1999 13:37:40 | PlayStation | Action | - |
| Gex: Enter the Gecko (Jan 29, 1998 prototype) | 29 January 1998 10:49:34 | PlayStation | Platform | - |
| Ghost House (Prototype) | | Sega Master System | Action | - |
| Ghost Master (Jul 11, 2003 prototype) | 11 July 2003 02:49:06 | PlayStation 2 | Puzzle, strategy | - |
| Ghost Master (May 7, 2004 prototype) | 7 May 2004 | PlayStation 2 | Puzzle, strategy | - |
| Ghost Rider (Dec 10, 2006 prototype) | 10 December 2006 17:47:47 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Dec 13, 2006 prototype) | 13 December 2006 14:22:16 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Dec 14, 2006 10.06 prototype) | 14 December 2006 10:06:13 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Dec 14, 2006 10.22 prototype) | 14 December 2006 10:22:42 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Dec 14, 2006 17.05 prototype) | 14 December 2006 17:05:32 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Dec 18, 2006 14.15 prototype) | 18 December 2006 14:15:03 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Dec 18, 2006 15.13 prototype) | 18 December 2006 15:13:11 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Dec 18, 2006 17.17 prototype) | 18 December 2006 17:17:43 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Dec 6, 2006 08.26 prototype) | 6 December 2006 08:26:23 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Dec 6, 2006 11.03 prototype) | 6 December 2006 11:03:35 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Dec 6, 2006 11.19 prototype) | 6 December 2006 11:19:09 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Dec 8, 2006 09.44 prototype) | 8 December 2006 09:44:56 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Dec 8, 2006 10.31 prototype) | 8 December 2006 10:31:23 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Dec 8, 2006 18.04 prototype) | 8 December 2006 18:04:22 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Jan 10, 2006 prototype) | 10 January 2006 | Xbox | Action | ✓ |
| Ghost Rider (Jan 18, 2007 prototype) | 18 January 2007 16:49:03 | PlayStation Portable | Action | - |
| Ghost Rider (Jan 2, 2007 prototype) | 2 January 2007 16:41:20 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Jan 3, 2007 prototype) | 3 January 2007 14:17:06 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Jan 5, 2006 prototype) | 5 January 2006 | Xbox | Action | ✓ |
| Ghost Rider (Jan 5, 2007 build) | 5 January 2007 12:53:44 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Nov 10, 2006 prototype) | 10 November 2006 11:25:41 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Nov 13, 2006 prototype) | 13 November 2006 08:14:13 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Nov 14, 2006 prototype) | 14 November 2006 11:00:23 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Nov 17, 2006 prototype) | 17 November 2006 15:24:08 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Nov 2, 2006 prototype) | 2 November 2006 10:32:14 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Nov 27, 2006 prototype) | 27 November 2006 10:46:00 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Nov 3, 2006 prototype) | 3 November 2006 14:55:24 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Nov 6, 2006 prototype) | 6 November 2006 08:37:10 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Nov 7, 2005 prototype) | 7 November 2005 | Xbox | Action | ✓ |
| Ghost Rider (Nov 8, 2006 14.24 prototype) | 8 November 2006 14:24:58 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Nov 8, 2006 16.27 prototype) | 8 November 2006 16:27:49 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Nov 9, 2006 prototype) | 9 November 2006 11:09:39 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Oct 12, 2006 prototype) | 12 October 2006 12:51:03 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Oct 13, 2006 prototype) | 13 October 2006 09:58:26 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Oct 16, 2006 prototype) | 16 October 2006 10:47:37 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Oct 17, 2006 prototype) | 17 October 2006 12:19:16 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Oct 18, 2006 prototype) | 18 October 2006 10:29:27 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Oct 20, 2006 prototype) | 20 October 2006 09:07:26 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Oct 23, 2006 prototype) | 23 October 2006 08:39:02 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Oct 26, 2006 prototype) | 26 October 2006 09:14:19 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Oct 3, 2006 prototype) | 3 October 2006 09:57:41 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Oct 4, 2006 prototype) | 4 October 2006 08:19:59 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Oct 5, 2006 prototype) | 5 October 2006 12:55:35 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Sep 18, 2006 prototype) | 18 September 2006 10:58:01 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Sep 19, 2006 10.21 prototype) | 19 September 2006 10:21:57 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Sep 19, 2006 12.18 prototype) | 19 September 2006 12:18:50 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Sep 19, 2006 19.04 prototype) | 19 September 2006 19:04:11 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Sep 21, 2006 prototype) | 21 September 2006 11:10:22 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Sep 25, 2006 prototype) | 25 September 2006 09:35:53 | PlayStation 2 | Hack and Slash | - |
| Ghost Rider (Sep 27, 2006 prototype) | 27 September 2006 14:54:37 | PlayStation 2 | Hack and Slash | - |
| Ghostbusters (May 1, 1990 prototype) | 1 May 1990 19:22:12 | Sega Mega Drive | Platformer | - |
| Ghostbusters (Prototype) | | NES | Action | - |
| Ghoul Patrol (PAL build) | | SNES | Action | - |
| Ghouls 'N Ghosts (prototype) | | Sega Master System | Action | - |
| Ghouls 'n Ghosts (Jun 22, 1989 build) | 22 June 1989 16:25:00 | Sega Mega Drive | Platformer | - |
| Giant Killers (Jan 9, 2001 prototype) | 9 January 2001 | Dreamcast | Sports - Soccer | - |
| Gimmick! (Japan prototype) | | NES | Platform | - |
| Glimmerati (Apr 20, 2005 prototype) | 20 April 2005 | N-Gage | Racing | - |
| Glimmerati (May 10, 2005 prototype) | 10 May 2005 | N-Gage | Racing | - |
| Global Defense (Prototype) | | Sega Master System | Shooter | - |
| Global Domination (Dec 16, 1998 prototype) | 16 December 1998 16:00:32 | PlayStation | Strategy | - |
| Global Domination (Jun 28, 1998 prototype) | 28 June 1998 21:31:04 | PlayStation | Strategy | - |
| Global Gladiators (Jan 18, 1994 prototype) | 18 January 1994 18:01:13 | Game Boy | Platformer | ✓ |
| Global Gladiators (Jul 20, 1993 prototype) | 20 July 1993 11:23:26 | Game Boy | Platformer | ✓ |
| Global Gladiators (Jul 9, 1993 prototype) | 9 July 1993 11:32:06 | NES | Platformer | ✓ |
| Global Gladiators (Jun 16, 1993 prototype) | 16 June 1993 16:27:08 | NES | Platformer | ✓ |
| Global Gladiators (Jun 30, 1993 prototype) | 30 June 1993 14:11:52 | NES | Platformer | ✓ |
| Global Gladiators (May 28, 1993 prototype - A) | 28 May 1993 19:18:24 | NES | Platformer | ✓ |
| Global Gladiators (May 28, 1993 prototype) | 28 May 1993 18:16:30 | NES | Platformer | ✓ |
| Global Gladiators (Oct 10, 1993 prototype) | 4 October 1993 15:45:58 | Game Boy | Platformer | ✓ |
| Global Gladiators (Sep 27, 1993 prototype) | 27 September 1993 16:49:36 | Game Boy | Platformer | ✓ |
| Glover (Jul 16, 1998 prototype) | 16 July 1998 | Nintendo 64 | Platform | - |
| Glover 2 (Prototype A) | | Nintendo 64 | Platform | ✓ |
| Glover 2 (Prototype B) | | Nintendo 64 | Platform | ✓ |
| God of War: Chains of Olympus (Feb 1, 2008 prototype) | 1 February 2008 13:44:42 | PlayStation Portable | Action | - |
| God of War: Chains of Olympus (Feb 3, 2008 prototype) | 3 February 2008 | PlayStation Portable | | - |
| Gods (Sep 10, 1992 prototype) | 10 September 1992 | SNES | Action | - |
| Golden Axe (Nov 22, 1989 prototype) | 22 November 1989 10:24:08 | Sega Mega Drive | Beatem Up | - |
| Golden Axe (Oct 14, 1989 prototype) | 14 October 1989 | Sega Mega Drive | Beatem Up | - |
| Golden Axe III (Europe) | | Sega Mega Drive | Beat 'em Up | ✓ |
| Golden Axe: Beast Rider (Jul 21, 2008 prototype) | 11 July 2008 | Xbox 360 | Golden_Axe-2008-07-21-Title.PNG | - |
| Golden Oldies 2: Blockbuster and Bughunt (Apr 26, 1996 prototype) | 26 April 1996 | Philips CD-i | FMV | - |
| GoldenEye 007: Reloaded (Nov 7, 2011 prototype) | 7 November 2011 | Xbox 360 | FPS | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Dec 13, 1994 prototype) | 13 December 1994 13:26:28 | Sega 32X | Sports - Golf | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Dec 14, 1994 prototype) | 14 December 1994 21:08:38 | Sega 32X | Sports - Golf | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Dec 19, 1994 prototype) | 19 December 1994 22:10:22 | Sega 32X | Sports - Golf | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Dec 2, 1994 prototype) | 2 December 1994 13:30:40 | Sega 32X | Sports - Golf | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Dec 21, 1994 PAL prototype) | 21 December 1994 12:05:28 | Sega 32X | Sports - Golf | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Dec 21, 1994 prototype) | 21 December 1994 09:41:40 | Sega 32X | Sports - Golf | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Dec 3, 1994 prototype) | 3 December 1994 22:39:08 | Sega 32X | Sports - Golf | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Dec 6, 1994 prototype) | 6 December 1994 11:45:02 | Sega 32X | Sports - Golf | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Jul 6, 1994 prototype) | 6 July 1994 13:47:22 | Sega 32X | Sports - Golf | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Nov 1, 1994 prototype) | 1 November 1994 13:52:46 | Sega 32X | Sports - Golf | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Nov 10, 1994 prototype) | 10 November 1994 10:11:44 | Sega 32X | Sports - Golf | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Nov 16, 1994 prototype) | 16 November 1994 00:42:40 | Sega 32X | Sports - Golf | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Nov 18, 1994 prototype) | 18 November 1994 12:20:58 | Sega 32X | Sports - Golf | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Nov 19, 1994 prototype) | 19 November 1994 02:45:06 | Sega 32X | Sports - Golf | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Nov 21, 1994 prototype) | 21 November 1994 15:19:24 | Sega 32X | Sports - Golf | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Nov 22, 1994 prototype B) | 22 November 1994 15:37:30 | Sega 32X | Sports - Golf | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Nov 22, 1994 prototype) | 22 November 1994 07:32:54 | Sega 32X | Sports - Golf | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Nov 23, 1994 prototype) | 23 November 1994 10:43:32 | Sega 32X | Sports - Golf | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Nov 26, 1994 prototype) | 25 November 1994 23:52:52 | Sega 32X | Sports - Golf | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Nov 27, 1994 prototype) | 26 November 1994 20:53:10 | Sega 32X | Sports - Golf | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Nov 28, 1994 prototype B) | 28 November 1994 18:54:48 | Sega 32X | Sports - Golf | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Nov 28, 1994 prototype) | 28 November 1994 08:52:18 | Sega 32X | Sports - Golf | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Nov 29, 1994 prototype B) | 29 November 1994 15:57:40 | Sega 32X | Sports - Golf | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Nov 29, 1994 prototype) | 29 November 1994 10:31:20 | Sega 32X | Sports - Golf | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Nov 3, 1994 prototype) | 3 November 1994 10:10:14 | Sega 32X | Sports - Golf | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Nov 30, 1994 prototype) | 30 November 1994 15:52:16 | Sega 32X | Sports - Golf | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Nov 5, 1994 prototype) | 5 November 1994 14:15:04 | Sega 32X | Sports - Golf | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Nov 7, 1994 prototype) | 7 November 1994 12:13:34 | Sega 32X | Sports - Golf | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Nov 8, 1994 prototype) | 8 November 1994 23:27:08 | Sega 32X | Sports - Golf | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Oct 11, 1994 prototype) | 11 October 1994 16:10:50 | Sega 32X | Sports - Golf | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Oct 17, 1994 prototype) | 17 October 1994 20:39:34 | Sega 32X | Sports - Golf | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Oct 18, 1994 prototype) | 20 October 1994 09:48:08 | Sega 32X | Sports - Golf | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Oct 24, 1994 prototype) | 24 October 1994 09:28:18 | Sega 32X | Sports - Golf | - |
| Golf Magazine: 36 Great Holes Starring Fred Couples (Oct 26, 1994 prototype) | 26 October 1994 10:09:32 | Sega 32X | Sports - Golf | - |
| Golfamania (Prototype) | | Sega Master System | Sports | - |
| Gothic (Oct 11, 2000 prototype) | 21 December 2000 18:00:42 | PC | Role playing | - |
| Gothic: The Sequel (Oct 31, 2001 prototype) | 31 October 2001 23:00:00 | PC | Role playing | ✓ |
| Grabbed by the Ghoulies (Aug 28, 2003 prototype) | 28 August 2003 09:14:35 | Xbox | Action | - |
| Gradius III and IV (Sep 11, 2000 prototype) | 11 September 2000 17:12:28 | PlayStation 2 | Shoot-em-Up | - |
| Gran Turismo 3: A-Spec (Apr 18, 2001 prototype) | 18 April 2001 11:25:56 | PlayStation 2 | Racing | - |
| Gran Turismo 3: A-Spec (Oct 10, 2000 prototype) | 10 October 2000 | PlayStation 2 | Racing | - |
| Gran Turismo 4: Prologue (Sep 25, 2003 prototype) | 25 September 2003 | PlayStation 2 | Racing | - |
| Granada (REV01 prototype) | | Sega Mega Drive | Shooter | - |
| Grandia II (Jun 1, 2000 demo) | 1 June 2000 23:11:02 | Dreamcast | Role playing | - |
| Granhistoria: Genshi Sekaiki (Mar 16, 1995 prototype) | 16 March 1995 | SNES | Role Playing | - |
| Gravity Games Bike: Street Vert Dirt (Apr 29, 2002 prototype) | 29 April 2002 05:20:42 | PlayStation 2 | Sports - Biking | - |
| Great Golf (Prototype) | | Sega Master System | Sports - Golf | - |
| Greg Hastings Tournament Paintball (Mar 25, 2005 prototype) | 25 March 2005 17:57:41 | Xbox | Action | - |
| Greg Hastings Tournament Paintball 2 (Sep 15, 2005 prototype) | 15 September 2005 15:12:08 | Xbox | Action | - |
| Growl (Aug 26, 1991 prototype) | 26 August 1991 14:13:54 | Sega Mega Drive | Beat Em' Up | - |
| Guilty Gear Isuka (Aug 15, 2004 prototype) | 15 August 2004 19:59:30 | PlayStation 2 | Fighting | - |
| Guilty Gear Isuka (Oct 6, 2004 prototype) | 6 October 2004 01:17:00 | PlayStation 2 | Fighting | - |
| Gun (Aug 31, 2005 prototype) | 31 August 2005 19:08:26 | Xbox | Action | - |
| Gun (Prototype) | 7 April 2004 | Nintendo GameCube | Action | - |
| Gunlok (Oct 12, 2000 prototype) | 12 October 2000 | PC | | - |
| Gunple: Gunman's Proof (Prototype) | | SNES | Action | - |
| Gunslinger Girl Volume I (Jun 29, 2003 prototype) | 29 June 2003 23:02:00 | PlayStation 2 | Action-adventure | - |
| Gunslinger Girl Volume I (Sep 29, 2003 prototype) | 29 September 2003 19:08:00 | PlayStation 2 | Action-adventure | - |
| Gunstar Heroes (Prototype) | | Sega Mega Drive | Action | - |
| Habbo Islands (Oct 27th, 2006) | 27 October 2006 | N-Gage | Simulation | ✓ |
| Half-Life (Apr 20, 2001 prototype) | 20 April 2001 09:13:38 | Dreamcast | FPS | ✓ |
| Half-Life (Jul 13, 2001 prototype) | 13 July 2001 | Dreamcast | FPS | ✓ |
| Half-Life (Nov 7, 2000 video) | 7 November 2000 18:12:58 | Dreamcast | FPS | ✓ |
| Half-Life (Sep 4, 1997 prototype) | 4 September 1997 | PC | FPS | - |
| Halo 2 (Jun 28, 2004 prototype) | | Xbox | FPS | - |
| Halo: Combat Evolved (Aug 15, 2001 prototype) | 15 August 2001 22:42:15 | Xbox | First-person shooter | - |
| Halo: Combat Evolved (Oct 12, 2001 prototype) | 12 October 2001 19:12:36 | Xbox | First-person shooter | - |
| Halo: Reach (Jul 24, 2010 prototype) | 24 July 2010 | Xbox 360 | First-person shooter | - |
| Hang On & Safari Hunt (Prototype) | | Sega Master System | Compilation | - |
| Hang-On (Prototype) | | Sega Master System | Racing | - |
| Hanna Barbera's Turbo Toons (Atlus prototype) | | SNES | Racing | - |
| Haou Taikei Ryuu Knight: Lord of Paladin (Prototype) | | SNES | Role Playing | - |
| Happily Ever After (Prototype) | | NES | Adventure | ✓ |
| Hard Corps: Uprising (E3 2010 Preview Prototype) | | | run-n-gun | - |
| Hard Drivin' (Prototype) | 26 March 1991 | NES | Racing | ✓ |
| Harry Potter: Quidditch World Cup (Aug 10, 2003 15.48 prototype) | 10 August 2003 15:48:00 | PlayStation 2 | Sports | - |
| Harry Potter: Quidditch World Cup (Aug 10, 2003 17.05 prototype) | 10 August 2003 17:05:00 | PlayStation 2 | Sports | - |
| Harry Potter: Quidditch World Cup (Aug 12, 2003 prototype) | 12 August 2003 00:21:00 | PlayStation 2 | Sports | - |
| Hatris (Prototype) | | NES | Puzzle | - |
| Heart of Darkness (May 31, 1996 prototype) | 31 May 1996 19:12:14 | Sega Saturn | Adventure | ✓ |
| Heatseeker (Jan 15, 2007 prototype) | 15 January 2007 | PlayStation Portable | Flight Simulator | - |
| Heavenly Sword (Jun 26, 2007 prototype) | 26 June 2007 | PlayStation 3 | | - |
| Hebereke's Popoon (November 3, 1993 prototype) | 3 November 1993 | SNES | Puzzle | - |
| Heisei Kyouiku Iinkai Jr. prototype | | Sega Pico | Educational | - |
| Heisei Ten Sai Baka Bon Minna De Famiri-Restutoranni-Kun prototype | | Sega Pico | Educational | - |
| Hell Gate (Apr 10, 2001 prototype) | | Dreamcast | Shooter | ✓ |
| Heroes of Might and Magic III (Aug 11, 2000 prototype) | 11 August 2000 14:23:16 | Dreamcast | Turn-based strategy | ✓ |
| Hexen (Dec 12, 1996 prototype) | 12 December 1996 15:46:37 | Sega Saturn | FPS | - |
| Hexen (Sep 27, 1994 Prototype) | | PC | | - |
| Hey Arnold! The Movie (Prototype) | 2002 | Game Boy Advance | Platform | - |
| Hidden & Dangerous (Jul 30, 2000 prototype) | 30 July 2000 20:37:32 | Dreamcast | Action | - |
| Hieperdepiep ik lees (Mar 16, 1996 prototype) | 16 March 1996 | Philips CD-i | Action | - |
| High Seas Havoc (early prototype) | 1992 | Sega Mega Drive | Platform | - |
| High Seize (Jul 8, 2005 prototype) | 8 July 2005 | N-Gage | Action | - |
| Hit & Myth (Prototype) | | Gizmondo | Action | ✓ |
| Hitler No Fukkatsu: Top Secret (prototype) | | NES | Action | - |
| Hitman 2: Silent Assassin (Aug 19, 2002 prototype) | 19 August 2002 03:31:24 | PlayStation 2 | Stealth | - |
| Home Alone 2: Lost in New York (Sep 29, 1993 build) | 29 September 1993 04:19:08 | Sega Mega Drive | Platformer | - |
| Hondenliefde (Feb 1, 1995 prototype) | 1 February 1995 | Philips CD-i | FMV | - |
| Honoo no Doukyuuji: Dodge Danpei (Prototype) | | SNES | Sports - Soccer | - |
| Hook (Prototype) | | Sega Master System | Action | ✓ |
| Hoyle Casino '99 (prototype) | 30 July 1999 | PC | Casino | - |
| Huckle and Lowly's Busiest Day Ever (Apr 22, 1994 prototype) | 22 April 1994 09:56:20 | Sega Pico | Educational | - |
| Huckle and Lowly's Busiest Day Ever (Apr 24, 1994 prototype) | 25 April 1994 06:02:22 | Sega Pico | Educational | - |
| Huckle and Lowly's Busiest Day Ever (Apr 26, 1994 prototype A) | 27 April 1994 17:49:56 | Sega Pico | Educational | - |
| Huckle and Lowly's Busiest Day Ever (Apr 26, 1994 prototype B) | 26 April 1994 16:12:40 | Sega Pico | Educational | - |
| Huckle and Lowly's Busiest Day Ever (Apr 26, 1994 prototype D) | | Sega Pico | Educational | - |
| Huckle and Lowly's Busiest Day Ever (Apr 26, 1994 prototype E) | 26 April 1994 22:44:28 | Sega Pico | Educational | - |
| Huckle and Lowly's Busiest Day Ever (Apr 27, 1994 prototype) | 27 April 1994 18:05:48 | Sega Pico | Educational | - |
| Huckle and Lowly's Busiest Day Ever (Jul 21, 1994 prototype F) | 21 July 1994 14:49:38 | Sega Pico | Educational | - |
| Huckle and Lowly's Busiest Day Ever (Mar 2, 1994 prototype) | 2 March 1994 10:53:34 | Sega Pico | Educational | - |
| Huckle and Lowly's Busiest Day Ever (May 10, 1994 prototype D) | 10 May 1994 08:28:18 | Sega Pico | Educational | - |
| Huckle and Lowly's Busiest Day Ever (May 3, 1994 prototype A) | 3 May 1994 15:14:36 | Sega Pico | Educational | - |
| Huckle and Lowly's Busiest Day Ever (May 3, 1994 prototype B) | 3 May 1994 15:25:44 | Sega Pico | Educational | - |
| Huckle and Lowly's Busiest Day Ever (May 3, 1994 prototype C) | 3 May 1994 18:53:02 | Sega Pico | Educational | - |
| Huckle and Lowly's Busiest Day Ever (May 3, 1994 prototype D) | 3 May 1994 19:03:32 | Sega Pico | Educational | - |
| Huckle and Lowly's Busiest Day Ever (May 6, 1994 prototype A) | 6 May 1994 16:35:12 | Sega Pico | Educational | - |
| Huckle and Lowly's Busiest Day Ever (May 6, 1994 prototype B) | 6 May 1994 16:45:54 | Sega Pico | Educational | - |
| Huckle and Lowly's Busiest Day Ever (May 9, 1994 prototype B) | 9 May 1994 13:47:20 | Sega Pico | Educational | - |
| Huckle and Lowly's Busiest Day Ever (May 9, 1994 prototype C) | 9 May 1994 20:05:34 | Sega Pico | Educational | - |
| Huckle and Lowly's Busiest Day Ever (May 9, 1994 prototype D) | 9 May 1994 21:39:18 | Sega Pico | Educational | - |
| Huckle and Lowly's Busiest Day Ever (May 9, 1994 prototype) | 9 May 1994 11:30:44 | Sega Pico | Educational | - |
| Huckle and Lowly's Busiest Day Ever (Oct 4, 1994 prototype) | 3 October 1994 19:18:16 | Sega Pico | Educational | - |
| Huckle and Lowly's Busiest Day Ever (Sep 19, 1994 prototype) | 19 September 1994 10:31:44 | Sega Pico | Educational | - |
| Hydro Thunder (Jul 16, 1999 prototype) | 16 July 1999 13:47:50 | Dreamcast | Racing | - |
| Hydro Thunder (Jun 16, 1999 prototype) | 16 June 1999 17:49:18 | Dreamcast | Racing | - |
| Hydro Thunder (Sep 8, 1999 prototype) | 8 September 1999 17:15:42 | Dreamcast | Racing | - |
| Hyper Dunk: The Playoff Edition (Prototype) | | Sega Mega Drive | Sports - Basketball | - |
| Hyper Iria (Jul 3, 1995 prototype) | 3 July 1995 | SNES | Action | - |
| I Spy Fun House (prototype) | | Nintendo DS | Puzzle | - |
| IMSA Racing (Prototype) | | Panasonic M2 | Racing | ✓ |
| Icebreaker II (Prototype) | | 3DO | Strategy/Action | ✓ |
| Ico (Dec 28, 2001 prototype) | 28 December 2001 16:58:20 | PlayStation 2 | Action-adventure | - |
| Ikinari Musician (Prototype) | | NES | Shooter | - |
| Illusion of Gaia (prototype) | | SNES | Action RPG | - |
| Impossible Mission (Prototype) | | Sega Master System | Action | - |
| In the Groove 2 (Aug 30, 2005 Prototype) | 30 August 2005 18:50:20 | PlayStation 2 | Rhythm - Dancing | ✓ |
| InFamous (Apr 14, 2009 prototype) | 14 April 2009 | PlayStation 3 | | - |
| Indiana Jones and the Infernal Machine (Australian Prototype) | | Nintendo 64 | Action | ✓ |
| Indiana Jones and the Last Crusade (Prototype) | | Sega Master System | Action | - |
| Infinity | | Game Boy Color | Role-Playing Video Game | ✓ |
| Intellivision Lives! (Dec 2, 2003 prototype) | 2 December 2003 20:17:20 | Xbox | Compilation | - |
| International Superstar Soccer 2 (Jan 11, 2002 prototype) | 11 January 2002 15:16:02 | PlayStation 2 | Sports - Soccer | - |
| Internet Game Pack (Feb 28, 2001 prototype) | 28 February 2001 01:59:40 | Dreamcast | Multiplayer | ✓ |
| Invasion From The Planet Skyron (May 31, 1995 prototype) | 31 May 1995 | Philips CD-i | FMV | - |
| Iridion II (prototype) | | Game Boy Advance | | - |
| Isle of Minno (May 12, 2006 prototype) | 12 May 2006 12:52:11 | PlayStation Portable | Adventure | ✓ |
| Itadaki Street 2: Neon Sign ha Bara Iro ni (Dec 20, 1993 prototype) | 20 December 1993 | SNES | Board Game | - |
| J.League Excite Stage '95 (Prototype) | | SNES | Sports - Soccer | - |
| JVC CD-ROM Emulator System | | | Dev Kit | - |
| Jack Nicklaus Golf (Jan 13, 1995 prototype - V003) | 13 January 1995 | Atari Jaguar | Sports | ✓ |
| Jack Nicklaus Golf (Jan 16, 1995 prototype - V004) | 16 January 1995 | Atari Jaguar | Sports | ✓ |
| Jack Nicklaus Golf (Jul 4, 1994 prototype - V002) | 4 July 1994 | Atari Jaguar | Sports | ✓ |
| Jack Nicklaus Golf (Jul 4, 1994 prototype - V002A) | 4 July 1994 | Atari Jaguar | Sports | ✓ |
| Jack Nicklaus Golf (Jul 4, 1994 prototype) | 4 July 1994 | Atari Jaguar | Sports - Golf | ✓ |
| Jacked (May 4, 2004 prototype) | 4 May 2004 01:03:00 | PlayStation 2 | Racing | - |
| Jackie Chan Adventures (Jul 19, 2004 prototype) | 19 July 2004 11:21:52 | PlayStation 2 | Action | - |
| Jade Cocoon: Story of the Tamamayu (Aug 5, 1999 prototype) | 5 August 1999 22:48:18 | PlayStation | Role playing | - |
| Jak 3 (Aug 24, 2004 demo) | 24 August 2004 00:29:29 | PlayStation 2 | Action | - |
| Jak 3 (Aug 5, 2004 demo) | 5 August 2004 00:03:42 | PlayStation 2 | Action | - |
| Jak 3 (Jul 12, 2004 prototype) | 12 July 2004 | PlayStation 2 | Action-adventure, third-person shooter | - |
| Jak 3 (Oct 1, 2004 prototype) | 1 October 2004 | PlayStation 2 | Action-adventure, third-person shooter | - |
| Jak 3 (Sep 14, 2004 prototype) | 14 September 2004 11:17:03 | PlayStation 2 | Action-adventure, third-person shooter | - |
| Jak II (Aug 18, 2003 prototype) | 18 August 2003 | PlayStation 2 | Action-adventure, third-person shooter | - |
| Jak II (Jul 13, 2003 prototype) | 13 July 2003 16:00:20 | PlayStation 2 | Action | - |
| Jak II (Jul 17, 2003 demo) | 17 July 2003 15:22:00 | PlayStation 2 | Action | - |
| Jak II (Mar 15, 2003 demo) | 15 March 2003 14:32:37 | PlayStation 2 | Action | - |
| Jak X: Combat Racing (Jun 23, 2005 NTSC prototype) | 23 June 2005 | PlayStation 2 | Racing | - |
| Jak X: Combat Racing (Jun 23, 2005 PAL prototype) | 23 June 2005 02:11:54 | PlayStation 2 | Racing | - |
| Jak and Daxter: The Precursor Legacy (Sep 18, 2001 demo) | 18 September 2001 | PlayStation 2 | | - |
| James 'Buster' Douglas Knockout Boxing (Prototype) | | Sega Master System | Sports - Boxing | - |
| James Bond 007: Agent Under Fire (Jan 25, 2002 prototype) | 25 January 2002 | Nintendo GameCube | FPS | - |
| James Bond 007: From Russia with Love (Jul 13, 2005 prototype) | 13 July 2005 14:32:31 | Xbox | Action | - |
| James Bond 007: From Russia with Love (Sep 11, 2005 prototype) | 11 September 2005 07:43:47 | Xbox | Action | - |
| James Bond 007: From Russia with Love (Sep 25, 2005 prototype) | 25 September 2005 18:39:29 | PlayStation 2 | Action | - |
| James Bond 007: From Russia with Love (Sep 30, 2005 prototype) | 30 September 2005 07:02:59 | Xbox | Action | - |
| Jeanne d'Arc (Aug 17, 2006 prototype) | 17 August 2006 15:22:14 | PlayStation Portable | Tactical role-playing | - |
| Jeff's Shoot'Em Up (Prototype) | | SNES | Shooter | ✓ |
| Jeremy McGrath Supercross 2000 (v0.800 prototype) | | Dreamcast | Racing | - |
| Jesse "The Body" Ventura Wrestling Superstars (Mar 2, 1992 prototype) | 2 March 1992 15:55:44 | Sega Mega Drive | Fighting | - |
| Jet Force Gemini (Aug 19, 1999 demo) | 19 August 1999 15:26:00 | Nintendo 64 | Action | - |
| Jet Moto 2124 (Jan 18, 2000 prototype) | 18 January 2000 13:51:11 | PlayStation | Racing | ✓ |
| Jet Set Radio (Oct 3, 2000 prototype) | 3 October 2000 12:15:43 | Dreamcast | Action | - |
| Jetpack (Prototype) | | Game Boy | Action | - |
| Jigsaw Party (Mar 25, 1994 prototype) | 25 March 1994 | SNES | Puzzle | - |
| Jimmy Connors Pro Tennis Tour (Prototype) | | SNES | Sports - Tennis | - |
| JoJo's Bizarre Adventure (Dec 20, 1999 prototype) | 20 December 1999 10:21:52 | PlayStation | Fighting | - |
| JoJo's Bizarre Adventure (Jan 11, 2000 prototype) | 11 January 2000 16:28:16 | Dreamcast | Fighting | - |
| Joe & Mac 2: Lost in the Tropics (prototype) | | SNES | Platformer | - |
| Joe Guard (prototype) | | Philips CD-i | FMV | ✓ |
| John Madden Football (Nov 7, 1990 prototype) | 7 November 1990 14:17:10 | Sega Mega Drive | Sports | - |
| Johnny Mnemonic (Mar 13, 1995 prototype) | 13 March 1995 17:38:41 | Sega CD | FMV | ✓ |
| Judgement Force (Nov 26, 1996 prototype) | 26 November 1996 | Sega Saturn | Beat 'em up | ✓ |
| Juiced (Jul 13, 2004 Acclaim Prototype) | 13 July 2004 | Xbox | Racing | ✓ |
| Juiced (Jun 11, 2004 Acclaim Prototype) | 11 July 2004 17:39:20 | PlayStation 2 | Racing | ✓ |
| Juiced: Eliminator (Apr 26, 2006 prototype) | 26 April 2006 | PlayStation Portable | | - |
| Jump (Prototype) | | Gizmondo | Action | - |
| Jurassic Park (Aug 3, 1993 protoype) | 3 August 1993 16:45:33 | Sega CD | Adventure | - |
| Jurassic Park (Jun 14, 1993 prototype) | 14 June 1993 17:08:28 | Sega Mega Drive | Platformer | - |
| Jurassic Park (May 26, 1993 build) | 26 May 1993 10:25:54 | Sega Mega Drive | Platformer | - |
| Jurassic Park (Prototype) | | SNES | Action | - |
| Jurassic Park - Rampage Edition (Jul 13, 1994 prototype) | 13 July 1994 18:44:56 | Sega Mega Drive | Action Platformer | - |
| Jurassic Park - Rampage Edition (Jul 14, 1994 prototype) | 14 July 1994 19:19:30 | Sega Mega Drive | Action Platformer | - |
| Jurassic Park - Rampage Edition (Jul 15, 1994 prototype) | 15 July 1994 20:09:02 | Sega Mega Drive | Action Platformer | - |
| Jurassic Park - Rampage Edition (Jul 17, 1994 prototype) | 17 July 1994 11:50:08 | Sega Mega Drive | Action Platformer | - |
| Jurassic Park - Rampage Edition (Jul 18, 1994 prototype) | 19 July 1994 05:39:36 | Sega Mega Drive | Action Platformer | - |
| Jurassic Park - Rampage Edition (Jul 19, 1994 prototype) | 19 July 1994 16:24:16 | Sega Mega Drive | Action Platformer | - |
| Jurassic Park - Rampage Edition (Jul 8, 1994 prototype) | 8 July 1994 17:14:28 | Sega Mega Drive | Action Platformer | - |
| Jurassic Park - Rampage Edition (Jun 20, 1994 prototype) | | Sega Mega Drive | Action Platformer | - |
| Jurassic Park - Rampage Edition (Jun 22, 1994 prototype) | 22 June 1994 07:48:44 | Sega Mega Drive | Action Platformer | - |
| Jurassic Park - Rampage Edition (Jun 30, 1994 prototype) | 30 June 1994 10:59:56 | Sega Mega Drive | Action Platformer | - |
| KISS Psycho Circus: The Nightmare Child (Nov 28, 2000 prototype) | 28 November 2000 14:38:30 | Dreamcast | FPS | - |
| KISS Psycho Circus: The Nightmare Child (Nov 3, 2000 prototype) | 3 November 2000 11:36:32 | Dreamcast | FPS | - |
| Kameo (Oct 1, 2004 prototype) | 1 October 2004 | Xbox | Action | ✓ |
| Kane & Lynch: Dead Men (Sep 13, 2007 prototype) | 13 September 2007 | Xbox 360 | | - |
| Kao the Kangaroo (Sep 25, 2000 prototype) | 25 September 2000 13:01:38 | Dreamcast | Action | - |
| Kasumi Ninja (Prototype) | | Atari Jaguar | Fighting | - |
| Kensei: Sacred Fist (Nov 2, 1998 prototype) | 2 November 1998 11:13:00 | PlayStation | Fighting | - |
| Kenyuu Densetsu Yaiba (Nov 1993 prototype) | November 1993 | SNES | Role playing | - |
| Key of Heaven (Nov 18, 2005 prototype) | 18 November 2005 | PlayStation Portable | | - |
| Kid Chameleon (Dec 19, 1991 prototype) | 19 December 1991 10:26:10 | Sega Mega Drive | Platformer | - |
| Kikansha Thomas Ni Notte prototype | | Sega Pico | Educational | - |
| Kikuni Masahiko no Jantoushi Dora Ou (Nov 15, 1992 prototype) | 15 November 1992 | SNES | Puzzle | - |
| Killer Instinct (prototype) | | SNES | Fighting | - |
| Killer7 (Jun 3, 2005 prototype) | 3 June 2005 14:28:35 | Nintendo GameCube | Action-adventure, rail shooter | - |
| Killer7 (May 11, 2005 prototype) | 11 May 2005 12:36:12 | Nintendo GameCube | Action-adventure, rail shooter | - |
| Killer7 (PAL prototype) | | Nintendo GameCube | Action-adventure, rail shooter | - |
| Killing Time (2.2 prototype) | | 3DO | FPS | - |
| Killing Time (Apr 28, 1997 prototype) | 28 April 1997 22:36:20 | PlayStation | Adventure, First-person shooter | ✓ |
| Killing Time (Aug 28, 1995 prototype) | 28 August 1995 | 3DO | FPS | - |
| Killing Time (Nov 30, 1995 prototype) | 30 November 1995 14:27:36 | 3DO | FPS | - |
| Killzone (Jul 29, 2004 prototype) | 29 July 2004 | PlayStation 2 | First-person shooter | - |
| Killzone (Oct 13, 2004 prototype) | 13 October 2004 | PlayStation 2 | | - |
| Killzone 2 (Jul 2, 2008 prototype) | 2 July 2008 | PlayStation 3 | | - |
| Killzone 3 (Nov 15, 2010 prototype) | 15 November 2010 | PlayStation 3 | | - |
| Killzone: Liberation (Aug 21, 2006 prototype) | 21 August 2006 22:24:52 | PlayStation Portable | FPS | - |
| Killzone: Liberation (Jul 19, 2006 prototype) | 19 July 2006 13:30:29 | PlayStation Portable | FPS | - |
| King Arthur's World (Prototype) | | SNES | RTS | - |
| King Neptune's Adventure (Prototype) | | NES | Action | - |
| King Of Fighters Extreme (Dec 5, 2004 prototype) | 5 December 2004 | N-Gage | Fighting | - |
| King of Fighters 2002 (Apr 7, 2005 prototype) | 7 April 2005 12:24:02 | PlayStation 2 | Fighting | - |
| King of Fighters R-1 & Melon-chan no Seichou Nikki (Prototype) | | Neo Geo Pocket Color | Fighting | - |
| King of Fighters R-2 (Prototype) | | Neo Geo Pocket Color | Fighting | - |
| King of the Monsters 2 (prototype) | | SNES | Fighting | - |
| King's Quest: Quest for the Crown (Prototype) | | Sega Master System | Adventure | - |
| Kingdom Hearts (Jul 29, 2002 prototype) | 29 July 2002 | PlayStation 2 | Action, role-playing | - |
| Kingdom Hearts II (Feb 1, 2006 prototype) | 1 February 2006 10:54:46 | PlayStation 2 | Action role-playing | - |
| Kingdom Hearts II (Feb 3, 2006 prototype) | 2 March 2006 05:36:47 | PlayStation 2 | Action role-playing | - |
| Kingdom Hearts Re:Chain of Memories (Oct 01, 2008 Preview) | 1 October 2008 18:30:44 | PlayStation 2 | Role playing | - |
| Kingdom II: Shadoan (Jun 11, 1996 prototype) | 11 June 1996 | Philips CD-i | FMV | - |
| Kingdom Under Fire: Circle of Doom (Sep 7, 2007 prototype) | 7 September 2007 | Xbox 360 | Action RPG | - |
| Kingdom Under Fire: The Crusaders (Jul 6, 2004 prototype) | 6 July 2004 07:41:43 | Xbox | Hack and Slash | - |
| Kingdom Under Fire: The Crusaders (Mar 14, 2003 prototype) | 14 March 2003 | Xbox | Hack and Slash | - |
| Kingdom of Paradise (Oct 10, 2005 prototype) | 10 October 2005 01:00:44 | PlayStation Portable | Action role-playing | - |
| Kingdom: The Far Reaches (Dec 22, 1994 prototype) | 22 December 1994 | Philips CD-i | FMV | - |
| Kirikou and the Wild Beasts (prototype) | | Nintendo DS | Platform | - |
| Klax (Jun 21, 1990 prototype) | 21 June 1990 17:41:36 | Sega Mega Drive | Puzzle | - |
| Klax (Prototype) | | Atari Lynx | Puzzle | - |
| Klonoa 2: Lunatea's Veil (Jun 4, 2001 prototype) | 4 June 2001 | PlayStation 2 | Action-adventure | - |
| Klonoa 2: Lunatea's Veil (Sep 17, 2001 build) | 17 September 2001 20:01:12 | PlayStation 2 | Action | - |
| Knuckles' Chaotix (Dec 27, 1994 prototype) | 27 December 1994 09:28:48 | Sega 32X | Action Platformer | - |
| Knuckles' Chaotix (Dec 29, 1994 prototype) | 30 December 1994 14:31:44 | Sega 32X | Action Platformer | - |
| Knuckles' Chaotix (Dec 7, 1994 prototype) | 7 December 1994 06:15:32 | Sega 32X | Action Platformer | - |
| Knuckles' Chaotix (Feb 10, 1995 prototype) | 10 February 1995 05:28:58 | Sega 32X | Action Platformer | - |
| Knuckles' Chaotix (Feb 13, 1995 prototype B) | 13 February 1995 05:46:08 | Sega 32X | Action Platformer | - |
| Knuckles' Chaotix (Feb 13, 1995 prototype) | 13 February 1995 06:29:24 | Sega 32X | Action Platformer | - |
| Knuckles' Chaotix (Feb 14, 1995 prototype) | 14 February 1995 05:46:16 | Sega 32X | Action Platformer | - |
| Knuckles' Chaotix (Feb 16, 1995 prototype) | 16 February 1995 18:06:36 | Sega 32X | Action Platformer | - |
| Knuckles' Chaotix (Feb 2, 1995 prototype) | 7 February 1995 14:25:54 | Sega 32X | Action Platformer | - |
| Knuckles' Chaotix (Feb 8, 1995 prototype) | 8 February 1995 10:17:48 | Sega 32X | Action Platformer | - |
| Knuckles' Chaotix (Feb 9, 1995 prototype) | 9 February 1995 07:25:52 | Sega 32X | Action Platformer | - |
| Knuckles' Chaotix (Jan 12, 1995 prototype) | 12 January 1995 08:36:32 | Sega 32X | Action Platformer | - |
| Knuckles' Chaotix (Jan 19, 1995 prototype) | 19 January 1995 06:04:34 | Sega 32X | Action Platformer | - |
| Koudelka (Oct 16, 1999 prototype) | 16 October 1999 20:00:00 | PlayStation | Role Playing | - |
| Kung Fu Fighting (Apr 30, 2001 prototype) | 29 April 2001 17:42:46 | PlayStation 2 | Fighting | ✓ |
| Kung Fu Panda (Dec 7, 2007 prototype) | 7 December 2007 20:06:24 | Nintendo Wii | Action-adventure | - |
| Kung Fu Panda (Mar 13, 2008 prototype) | 13 March 2008 | Xbox 360 | | - |
| Kuru Kuru Kururin (prototype) | | Game Boy Advance | Puzzle | - |
| Kururin Paradise (prototype) | | Game Boy Advance | Puzzle | - |
| Kyle Petty's No Fear Racing (prototype) | | SNES | Racing | - |
| Kyojin no Doshin (Demo) | | Nintendo 64DD | Action | - |
| Kyuukai Douchuuki (Prototype) | | Sega Mega Drive | Sports - Baseball | - |
| L.A. Rush (Aug 13, 2005 prototype) | 13 August 2005 13:17:52 | PlayStation 2 | Racing | - |
| L.A. Rush (Jul 15, 2006 prototype) | 15 July 2006 | Xbox | Racing | - |
| LEGO Island 2: The Brickster's Revenge (Prototype) | | PlayStation | Action | - |
| LEGO Racers 2 (Prototype) | 2001 | Game Boy Advance | | - |
| Landstalker (Feb 24, 1993 prototype) | 24 February 1993 11:55:00 | Sega Mega Drive | Roleplaying | - |
| Landstalker (Jul 13, 1993 build) | 13 July 1993 10:26:24 | Sega Mega Drive | Roleplaying | - |
| Le Mans 24 Hours (Aug 20, 2000 prototype) | 20 August 2000 10:46:36 | Dreamcast | Racing | - |
| Legacy of Kain: Defiance (Oct 11, 2003 prototype) | 11 October 2003 | PlayStation 2 | Action-adventure | - |
| Legacy of Kain: Soul Reaver (Feb 16, 1999 prototype) | 16 February 1999 | PlayStation | Action | - |
| Legacy of Kain: Soul Reaver (Feb 4, 1999 prototype) | 4 February 1999 | PlayStation | Action | - |
| Legacy of Kain: Soul Reaver (Jan 18, 2000 prototype) | 18 January 2000 11:06:04 | Dreamcast | Action | - |
| Legacy of Kain: Soul Reaver (Jan 23, 1999 prototype) | 23 January 1999 | PlayStation | Action | - |
| Legacy of Kain: Soul Reaver (Jul 14, 1999 prototype) | 14 July 1999 | PlayStation | Action | - |
| Legacy of Kain: Soul Reaver (Jul 2, 1999 prototype) | 2 July 1999 | PlayStation | Action | - |
| Legacy of Kain: Soul Reaver (Jun 1, 1999 prototype) | 1 June 1999 | PlayStation | Action | - |
| Legacy of Kain: Soul Reaver (Jun 10, 1999 prototype) | 10 June 1999 | PlayStation | Action | - |
| Legacy of Kain: Soul Reaver (Jun 18, 1999 prototype) | 18 June 1999 | PlayStation | Action | - |
| Legacy of Kain: Soul Reaver (Jun 28, 1999 prototype) | 28 June 1999 11:11:20 | PlayStation | Action | - |
| Legacy of Kain: Soul Reaver (May 12, 1999 prototype) | 12 May 1999 19:07:20 | PlayStation | Action | - |
| Legend of Illusion Starring Mickey Mouse (Oct 11, 1994 prototype) | 11 October 1994 19:10:58 | Game Gear | Action Platformer | - |
| Legend of Illusion Starring Mickey Mouse (Oct 14, 1994 prototype) | 14 October 1994 18:32:46 | Game Gear | Action Platformer | - |
| Legend of Illusion Starring Mickey Mouse (Oct 17, 1994 prototype) | 17 October 1994 17:03:46 | Game Gear | Action Platformer | - |
| Legend of Illusion Starring Mickey Mouse (Sep 22, 1994 prototype) | 22 September 1994 11:35:24 | Game Gear | Action Platformer | - |
| Legend of Illusion Starring Mickey Mouse (Sep 30, 1994 prototype SEL) | 30 September 1994 16:21:02 | Game Gear | Action Platformer | - |
| Legend of Illusion Starring Mickey Mouse (Sep 30, 1994 prototype) | 30 September 1994 16:20:16 | Game Gear | Action Platformer | - |
| Legend of Legaia (Nov 16, 1998 prototype) | 16 November 1998 | PlayStation | | - |
| Lego Stunt Rally (Jun 2, 2000 prototype) | 2 June 2000 18:21:50 | PlayStation | Racing | ✓ |
| Leisure Suit Larry: Magna Cum Laude (Jul 31, 2004 prototype) | 31 July 2004 15:58:08 | Xbox | Adventure | - |
| Lemmings (Aug 8, 2006 prototype) | 8 August 2006 | PlayStation 2 | Puzzle | - |
| Lemmings (Dec 8, 2005 prototype) | 8 December 2005 | PlayStation Portable | Puzzle | - |
| Lemmings (Jan 18, 2006 prototype) | 18 January 2006 15:20:49 | PlayStation Portable | Puzzle | - |
| Lemmings (May 19, 1993 prototype) | 19 May 1993 | Game Boy | Puzzle | - |
| Lemmings (Sep 30, 2005 prototype) | 30 September 2005 10:14:15 | PlayStation Portable | Puzzle | - |
| Lemmings 2 Game Gear (Prototype) | | Game Gear | Puzzle | ✓ |
| Lemmings 2 Sega Master System (Prototype) | | Sega Master System | Puzzle | ✓ |
| Les Guignols de l'info (May 22, 1996 prototype) | 22 May 1996 | Philips CD-i | FMV | - |
| Les Maîtres de la peinture hollandaise au 17ème siècle (Apr 9, 1993 prototype) | 9 April 1993 | Philips CD-i | FMV | - |
| Lethal Enforcers (Aug 13, 1993 prototype) | 13 August 1993 | Sega Mega Drive | Shooter | - |
| Lethal Weapon 3 (Prototype) | | Sega Master System | Action | ✓ |
| Libero Grande (Aug 21, 1998 prototype) | 21 August 1998 01:00:00 | PlayStation | Arcade Soccer | - |
| Light Crusader (Jul 10, 1995 prototype) | 4 July 1995 13:52:56 | Sega Mega Drive | Role-Playing | - |
| Light Crusader (Jun 8, 1995 prototype) | 7 June 1995 11:45:26 | Sega Mega Drive | Role-Playing | - |
| Lightning Gunner (Apr 14, 1997 prototype) | | Sega Saturn | Shooter | ✓ |
| Lingo (Dec 16, 1994 prototype) | 16 December 1994 | Philips CD-i | FMV | - |
| Lingo (Mar 7, 1995 prototype) | 7 March 1995 | Philips CD-i | FMV | - |
| Lion King Adventure at Pride Rock (Apr 19, 1995 prototype) | 19 April 1995 13:53:26 | Sega Pico | Educational | - |
| Lion King Adventure at Pride Rock (Apr 25, 1995 prototype) | 26 April 1995 14:56:00 | Sega Pico | Educational | - |
| Lion King Adventure at Pride Rock (Jun 15, 1995 prototype) | 15 June 1995 15:54:20 | Sega Pico | Educational | - |
| Lion King Adventure at Pride Rock (Jun 16, 1995 prototype) | 16 June 1995 19:01:30 | Sega Pico | Educational | - |
| Lion King Adventure at Pride Rock (May 1, 1995 prototype) | 2 May 1995 09:03:34 | Sega Pico | Educational | - |
| Lion King Adventure at Pride Rock (May 16, 1995 prototype) | 16 May 1995 20:08:20 | Sega Pico | Educational | - |
| Lion King Adventure at Pride Rock (May 17, 1995 prototype) | 17 May 1995 12:10:48 | Sega Pico | Educational | - |
| Lion King Adventure at Pride Rock (May 22, 1995 prototype) | 25 May 1995 15:33:04 | Sega Pico | Educational | - |
| Little Big Adventure (Jan 27, 1997 prototype) | 27 January 1997 14:00:52 | PlayStation | Action-adventure | - |
| Little Magic (Japan Prototype) | | SNES | Action | - |
| Little Magic (PAL Prototype) | | SNES | Action | ✓ |
| Little Mermaid: Ningyo Hime (Prototype) | | NES | Action | - |
| LittleBigPlanet (Jun 29, 2009 prototype) | 29 June 2009 | PlayStation Portable | Puzzle-platformer | - |
| LittleBigPlanet 2 (Early DC Comics Build) | 29 April 2013 | PlayStation 3 | Puzzle-platformer | - |
| LittleBigPlanet 3 (LBP3 r513946 Build) | 20 September 2013 | PlayStation 3 | Puzzle-platformer | - |
| LittleBigPlanet Karting (Aug 1, 2012 prototype) | 1 August 2012 | PlayStation 3 | Racing | - |
| Loaded (Sep 3, 1996 prototype) | 25 June 1996 22:46:31 | Sega Saturn | Shooter | - |
| Loadstar: The Legend of Tully Bodine (Oct 13, 1994 prototype) | 13 October 1994 16:59:21 | Sega CD | Shooting | - |
| Lobo (Prototype - SNES) | | SNES | Fighting | ✓ |
| Lobo prototype | | Sega Mega Drive | Fighter (2D) | ✓ |
| Lock's Quest (prototype) | | Nintendo DS | Real-time strategy, Tower defense | - |
| LocoRoco (Apr 20, 2006 prototype) | 20 April 2006 17:36:55 | PlayStation Portable | Action | - |
| LocoRoco 2 (Sep 5, 2008 prototype) | 5 September 2008 19:33:56 | PlayStation Portable | Action | - |
| Logos Panic GO.A.I.SA.TU. (Satellaview) | | Satellaview | Puzzle | - |
| Looney Tunes: Space Race (Jul 31, 2000 prototype) | 31 July 2000 12:27:04 | Dreamcast | Racing | - |
| Lord of the Rings: Conquest (Oct 15, 2008 prototype) | 15 October 2008 | Xbox 360 | | - |
| Lost Boys Interactive (Prototype) | | Philips CD-i | FMV | - |
| Lost Kingdoms (Mar 4, 2002) | 4 March 2002 | Nintendo GameCube | Role playing | - |
| Lost Planet 2 (Dec 16, 2009 protoype) | 10 December 2009 | Xbox 360 | Third-person shooter | - |
| Lost Planet 2 (Jan 27, 2010 prototype) | 27 January 2010 | Xbox 360 | Third-person shooter | - |
| Lost Planet: Colonies (Mar 10, 2008 prototype) | 10 March 2008 | Xbox 360 | | - |
| Lotus II: RECS (Prototype) | | Sega Mega Drive | Action | - |
| Loving for a Lifetime (Mar 7, 1995 prototype) | 7 March 1995 | Philips CD-i | FMV | - |
| Lucky Luke (Prototype) | | SNES | Action | - |
| Lucky Luke: The Video Game (Jun 21, 1996 prototype) | 21 June 1996 | Philips CD-i | FMV | - |
| Lufia & the Fortress of Doom (Tech demo) | | Sega Mega Drive | Role Playing | ✓ |
| M.C. Kids (Prototype) | 1992 | NES | | - |
| MDK2 (Jan 26, 2000 17:51 prototype) | 26 January 2000 17:51:18 | Dreamcast | Action | - |
| MDK2 (Jan 26, 2000 19:14 prototype) | 26 January 2000 19:14:56 | Dreamcast | Action | - |
| MDK2 (Mar 5, 2000 prototype) | 5 March 2000 20:59:32 | Dreamcast | Action | - |
| MDK2 (Nov 30, 1999 prototype) | 30 November 1999 | Dreamcast | Action | - |
| MLB 2004 (Jan 6, 2003 prototype) | 6 January 2003 18:23:21 | PlayStation 2 | Sports - Baseball | - |
| MLB 2004 (Jan 8, 2003 prototype) | 8 January 2003 | PlayStation 2 | Sports | - |
| MSR: Metropolis Street Racer (May 9, 2000 prototype) | 9 May 2000 16:06:32 | Dreamcast | Racing | - |
| MSR: Metropolis Street Racer (Nov 10, 1999 prototype) | 10 November 1999 16:13:32 | Dreamcast | Racing | - |
| MSR: Metropolis Street Racer (Oct 10, 2000 prototype) | 10 October 2000 07:02:32 | Dreamcast | Racing | - |
| MSR: Metropolis Street Racer (prototype) | | Dreamcast | Racing | - |
| MTV Sports: Snowboarding (Sep 17, 1999 prototype) | 17 September 1999 16:23:04 | PlayStation | Sports - Snowboarding | - |
| MX vs. ATV Untamed (Nov 20, 2007 prototype) | 20 November 2007 16:07:56 | PlayStation Portable | Racing | - |
| Macross VF-X2, Patlabor - The Game (Demo Disc) | | PlayStation | | - |
| Mad Dog McCree (Aug 26, 1994 prototype) | 26 August 1994 | Philips CD-i | FMV | - |
| Madden NFL '08 (May 8, 2007 prototype) | 8 May 2007 | Xbox | Sports - Football | - |
| Madden NFL '96 (Oct 25, 1995) | 25 October 1995 03:28:04 | PlayStation | Sports - Football | ✓ |
| Made Man (May 11, 2004 E3 Prototype) | 11 May 2004 | Xbox | Action | ✓ |
| MagForce Racing (Apr 5, 2000 prototype) | 5 April 2000 | Dreamcast | Racing | - |
| MagForce Racing (May 24, 2000 prototype) | 24 May 2000 20:21:08 | Dreamcast | Racing | - |
| MageWar (Nov 8, 2002 prototype) | 8 November 2002 | Xbox | Action | ✓ |
| Magic & Mayhem: The Art of Magic (Sep 18, 2001 prototype) | 18 September 2001 10:23:53 | PC | Role playing | - |
| Magic Boy (Prototype) | | SNES | Action | - |
| Magical Doropie (Prototype) | | NES | Action | - |
| Magical Drop (Prototype) | | Neo Geo Pocket Color | Puzzle | - |
| Magician (Mar, 02 1990 prototype) | 2 March 1990 | NES | Adventure | - |
| Mahjong Sengoku Jidai (Prototype) | | Sega Master System | Table | - |
| Mail Plane (Prototype 1) | | Other | Arcade | ✓ |
| Mail Plane (Prototype 2) | | Other | Arcade | ✓ |
| Major Damage (Jul 14, 1996 prototype) | 14 July 1996 12:43:48 | Sega Saturn | Action | ✓ |
| Major Damage (Jun 14, 1996 prototype) | 14 June 1996 08:32:54 | Sega Saturn | Action | ✓ |
| Major League Baseball 2K6 (May 18, 2006 prototypes) | 18 May 2006 | Nintendo GameCube | Sports - Baseball | - |
| Major League Baseball 2K6 (prototype) | | Nintendo DS | Sports | ✓ |
| Major Stryker (Aug 12, 1992 prototype) | 12 August 1992 13:56:46 | PC | Shooter | - |
| Make My Video: INXS (Dec 15, 1992 prototype) | 15 December 1992 12:49:04 | Sega CD | FMV | - |
| Make My Video: INXS (Jan 18, 1993 prototype) | 18 January 1993 09:30:11 | Sega CD | FMV | - |
| Make My Video: Kris Kross (Nov 30, 1992 prototype) | 30 November 1992 10:10:02 | Sega CD | FMV | - |
| Make My Video: Marky Mark and the Funky Bunch (Jan 20, 1993 prototype) | 20 January 1993 18:27:55 | Sega CD | FMV | - |
| Mandrake the Magician: Shadow of the Vehme (Prototype) | | Game Boy Advance | Adventure | ✓ |
| Maniac Moons (Feb 25, 1999 prototype) | 25 February 1999 | PlayStation | Flight Combat | ✓ |
| Maou Golvellius (Prototype) | | Sega Master System | Action | - |
| Marc Ecko's Getting Up: Contents Under Pressure (Dec 13, 2005 Prototype) | 13 December 2005 15:02:43 | Xbox | Action-adventure, beat 'em up | - |
| Marco Polo (May 2, 1995 prototype) | 2 May 1995 | Philips CD-i | FMV | - |
| Mario & Luigi: Superstar Saga (prototype) | | Game Boy Advance | Role-playing | - |
| Mario & Sonic at the Olympic Games (USA kiosk demo) | | Nintendo DS | Sports | - |
| Mario Artist Paint Studio (Feb 11, 1999 prototype) | 11 February 1999 12:27:49 | Nintendo 64DD | Art | - |
| Mario Kart DS (USA kiosk demo) | 30 May 2005 18:20:47 | Nintendo DS | Racing | - |
| Mario Kart: Super Circuit (prototype) | | Game Boy Advance | Racing | - |
| Mario Paint (prototype) | | SNES | Art | - |
| Mario Wacky Worlds (Mar 2, 1993 prototype) | 2 March 1993 | Philips CD-i | Action | - |
| Mario's Time Machine (Prototype) | | SNES | Educational | - |
| Marko's Magic Football (Apr 12, 1995 prototype) | 12 April 1995 17:20:45 | Sega CD | Action | ✓ |
| Marko's Magic Football (Prototype) | | Sega Mega Drive | Sports - Football | - |
| Marmalade Boy (Prototype) | | SNES | Strategy | - |
| Martin Mystery (prototype) | | Nintendo DS | Adventure | - |
| Maru's Quest (Prototype) | | SNES | Action | ✓ |
| Marvel vs. Capcom 2: New Age of Heroes (Aug 8, 2002 prototype) | 8 August 2002 09:45:10 | PlayStation 2 | Fighting | - |
| Marvel vs. Capcom 3: Fate of Two Worlds (Dec 14, 2010 prototype) | 14 December 2010 | PlayStation 3 | | - |
| Marvel: Ultimate Alliance (Feb 24, 2006 prototype) | 24 February 2006 14:47:55 | Xbox | Action | - |
| Master of Monsters (Apr 26, 1991 prototype) | 26 April 1991 16:25:14 | Sega Mega Drive | Strategy | - |
| Mat Hoffman's Pro BMX (Apr 12, 2001 prototype) | 12 April 2001 | PlayStation | Sports - Biking | - |
| Mat Hoffman's Pro BMX (Apr 4, 2001 prototype) | 4 April 2001 16:37:47 | PlayStation | Sports | - |
| Mat Hoffman's Pro BMX (Jun 29, 2001 prototype) | 29 June 2001 14:46:48 | Dreamcast | Sports | - |
| Mat Hoffman's Pro BMX 2 (May 17, 2002 prototype) | 17 May 2002 12:50:30 | PlayStation 2 | Sports | - |
| Matsumura Kunihiro Den: Saikyou no Rekishi wo Nurikaero! (Sample) | | SNES | Action | - |
| Max Magic (Aug 18, 1994 prototype) | 18 August 1994 | Philips CD-i | FMV | - |
| Max Power Racing (prototype) | | PlayStation | Racing | - |
| Maximum Force (Jul 24, 1997 prototype) | 24 July 1997 17:01:20 | PlayStation | Light Gun | - |
| Mazes of Fate (Prototype) | | Nintendo DS | RPG | - |
| McDonald's Treasure Land Adventure (Prototype) | | Sega Mega Drive | Action | - |
| MechAssault 2: LoneWolf (Oct 11, 2004 prototype) | 11 October 2004 | Xbox | Action | - |
| MediEvil (Aug 12, 1998 prototype) | 12 August 1998 10:20:09 | PlayStation | Adventure | - |
| MediEvil (Aug 19, 1998 prototype) | 19 August 1998 14:30:27 | PlayStation | Adventure | - |
| MediEvil (Aug 28, 1998 demo) | 28 August 1998 10:06:23 | PlayStation | Action | - |
| MediEvil (Aug 6, 1998 prototype) | 6 August 1998 16:41:18 | PlayStation | Action | - |
| MediEvil (Jul 14, 1998 prototype) | 14 July 1998 10:52:32 | PlayStation | Adventure | - |
| MediEvil (Jul 17, 1998 prototype) | 17 July 1998 13:39:40 | PlayStation | Adventure | - |
| MediEvil (Jul 21, 1998 prototype) | 21 July 1998 22:36:15 | PlayStation | Adventure | - |
| MediEvil (Jul 24, 1998 prototype) | 24 July 1998 11:21:56 | PlayStation | Adventure | - |
| MediEvil (Jul 28, 1998 prototype) | 28 July 1998 11:27:11 | PlayStation | Adventure | - |
| MediEvil (Jul 30, 1998 11.19 prototype) | 30 July 1998 11:19:59 | PlayStation | Adventure | - |
| MediEvil (Jul 30, 1998 13.53 prototype) | 30 July 1998 13:53:44 | PlayStation | Adventure | - |
| MediEvil (Jul 30, 1998 15.53 prototype) | 30 July 1998 15:53:05 | PlayStation | Adventure | - |
| MediEvil (Jul 31, 1998 prototype) | 31 July 1998 13:51:29 | PlayStation | Adventure | - |
| MediEvil (Jul 4, 1998 prototype) | 4 July 1998 13:37:16 | PlayStation | Adventure | - |
| MediEvil (Jul 6, 1998 prototype) | 6 July 1998 02:56:42 | PlayStation | Adventure | - |
| MediEvil (Jul 8, 1998 prototype) | 8 July 1998 17:11:19 | PlayStation | Adventure | - |
| MediEvil (Jul 9, 1998 prototype) | 9 July 1998 11:16:53 | PlayStation | Adventure | - |
| MediEvil (Jun 12, 1998 prototype) | 12 June 1998 15:11:25 | PlayStation | Adventure | - |
| MediEvil (Jun 15, 1998 prototype) | 15 June 1998 10:12:24 | PlayStation | Adventure | - |
| MediEvil (Jun 22, 1998 prototype) | 22 June 1998 13:34:39 | PlayStation | Adventure | - |
| MediEvil (Jun 26, 1998 prototype) | 26 June 1998 16:22:08 | PlayStation | Adventure | - |
| MediEvil (Jun 5, 1998 prototype) | 5 June 1998 10:48:07 | PlayStation | Adventure | - |
| MediEvil II (Dec 20, 1999 prototype) | 20 December 1999 21:37:00 | PlayStation | Adventure | - |
| MediEvil II (Feb 29, 2000 prototype) | 29 February 2000 10:25:14 | PlayStation | Adventure | - |
| MediEvil: Resurrection (Feb 15, 2005 prototype) | 15 February 2005 14:32:30 | PlayStation Portable | Action | - |
| MediEvil: Resurrection (Mar 18, 2005 prototype) | 18 March 2005 10:23:31 | PlayStation Portable | Action | - |
| Mega Bomberman (Eight Player Tech Demo) | | Sega Mega Drive | Arcade | ✓ |
| Mega Man Battle Network 2 (Oct 16, 2001 prototype - debug) | 16 October 2001 | Game Boy Advance | Action | - |
| Mega Man III (US Sample) | | Game Boy | Action | - |
| Mega Man Legends (May 8, 1998 prototype) | 8 May 1998 15:30:24 | PlayStation | Action Adventure | - |
| Mega Man Legends 2 (Jul 13, 2000 prototype) | 13 July 2000 11:22:20 | PlayStation | Adventure | - |
| Mega Man X: Command Mission E3 Version (May 8, 2004 prototype) | 8 May 2004 18:41:58 | PlayStation 2 | Role Playing | - |
| Mega Man: The Power Battle (Prototype) | | Arcade | Fighting | - |
| Mega Maze (Sep 13, 1993 prototype) | 13 September 1993 | Philips CD-i | | - |
| Mega Turrican (May 18, 1993 prototype) | 18 May 1993 | Sega Mega Drive | Shooter | - |
| Megadrive Emulator (Jan 15, 2001 prototype) | 15 January 2001 16:44:53 | Dreamcast | Compilation | ✓ |
| Megaman 64 (Prototype - Debug) | | Nintendo 64 | Adventure | - |
| Meikyu Kumikyoku: Milon no Daiboken (Prototype) | | NES | | - |
| Melodie (Sep 2, 2005 prototype) | | PlayStation Portable | Puzzle | ✓ |
| Metal Arms: Glitch in the System (May 2, 2003 prototype) | 2 May 2003 | Xbox | Action | - |
| Metal Gear Solid (Apr 27, 1998 Pilot Disc) | 27 April 1998 10:49:58 | PlayStation | Action | - |
| Metal Gear Solid (Jun 17, 1998 Pilot Disc) | 17 June 1998 16:48:28 | PlayStation | Action | - |
| Metal Gear Solid: Portable Ops (Feb 6, 2007 prototype) | 6 February 2007 14:44:02 | PlayStation Portable | Action | - |
| Metal Gear Solid: The Twin Snakes (Debug prototype) | | Nintendo GameCube | Action | - |
| Metal Head (Dec 13, 1994 prototype) | 13 December 1994 13:46:24 | Sega 32X | First Person Shooter | - |
| Metal Head (Dec 14, 1994 prototype) | 14 December 1994 17:46:56 | Sega 32X | First Person Shooter | - |
| Metal Head (Dec 2, 1994 prototype) | 2 December 1994 19:39:46 | Sega 32X | First Person Shooter | - |
| Metal Head (Dec 20, 1994 prototype) | 20 December 1994 11:17:38 | Sega 32X | First Person Shooter | - |
| Metal Head (Dec 7, 1994 prototype B) | 7 December 1994 21:26:22 | Sega 32X | First Person Shooter | - |
| Metal Head (Dec 7, 1994 prototype) | 7 December 1994 13:35:50 | Sega 32X | First Person Shooter | - |
| Metal Head (Dec 9, 1994 prototype) | 9 December 1994 19:57:54 | Sega 32X | First Person Shooter | - |
| Metal Head (Nov 14, 1994 prototype) | 14 November 1994 21:42:48 | Sega 32X | First Person Shooter | - |
| Metal Head (Nov 21, 1994 prototype) | 22 November 1994 21:03:18 | Sega 32X | First Person Shooter | - |
| Metal Head (Nov 28, 1994 prototype) | 28 November 1994 22:46:36 | Sega 32X | First Person Shooter | - |
| Metal Jack (Jul 30, 1992 prototype) | 30 July 1992 | SNES | Action | ✓ |
| Metal Slug - 2nd Mission (Trial) | | Neo Geo Pocket Color | | - |
| Metal Slug Advance (Prototype) | | Game Boy Advance | Run and gun | - |
| Metal Slug: Super Vehicle-001 (Prototype) | | Game Boy Advance | Run and gun | ✓ |
| Metroid Fusion (Sep 11, 2002 prototype - Debug) | 11 September 2002 | Game Boy Advance | Action | - |
| Metroid Fusion (Sep 16, 2002 prototype - Debug) | 16 September 2002 | Game Boy Advance | Action | - |
| Metroid Prime 3: Corruption (Mar 2, 2006 prototype - Debug) | 2 March 2006 14:55:13 | Nintendo GameCube | FPS | - |
| Metroid: Zero Mission (Dec 5, 2003 prototype - Debug) | 5 December 2003 11:57:00 | Game Boy Advance | Action | - |
| Metroid: Zero Mission (Jan 16, 2004 prototype - Debug) | 16 January 2004 16:56:00 | Game Boy Advance | Action | - |
| Michael Jackson's Moonwalker (Apr 24, 1990) | 24 April 1990 | Sega Mega Drive | Action | - |
| Michael Jackson's Moonwalker (Build) | | Sega Master System | Action | - |
| Mickey & Minnie Magical Adventure 2: The Great Circus Mystery (Prototype) | | SNES | Platformer | - |
| Mickey Mania: The Timeless Adventures of Mickey Mouse (Aug 25, 1994 prototype) | 25 August 1994 10:47:00 | Sega CD | Action Adventure | - |
| Mickey Mania: The Timeless Adventures of Mickey Mouse (Japanese localization prototype) | | SNES | Action Adventure | - |
| Mickey Mania: The Timeless Adventures of Mickey Mouse (Jul 18, 1994 prototype) | 18 July 1994 | SNES | Adventure | - |
| Mickey Mania: The Timeless Adventures of Mickey Mouse (Jul 1994 prototype) | | Sega Mega Drive | Action | - |
| Mickey Mania: The Timeless Adventures of Mickey Mouse (Sep 1994 prototype) | | Sega Mega Drive | Action | - |
| Mickey's Blast Into the Past (Aug 1, 1994 prototype) | 1 August 1994 15:56:30 | Sega Pico | Educational | - |
| Mickey's Blast Into the Past (Aug 9, 1994 prototype) | 9 August 1994 15:15:52 | Sega Pico | Educational | - |
| Mickey's Blast Into the Past (Jul 21, 1994 prototype) | 22 July 1994 18:55:30 | Sega Pico | Educational | - |
| Mickey's Blast Into the Past (Jul 23, 1994 prototype) | 23 July 1994 14:25:16 | Sega Pico | Educational | - |
| Mickey's Blast Into the Past (Jul 25, 1994 prototype) | 25 July 1994 13:32:50 | Sega Pico | Educational | - |
| Mickey's Blast Into the Past (Jun 8, 1994 prototype) | 8 June 1994 21:16:34 | Sega Pico | Educational | - |
| Mickey's Playtown Adventure: A Day Of Discovery! (Prototype) | | SNES | Educational | ✓ |
| Micky's Lustiges Abenteurer (Prototype) | | Sega Pico | | ✓ |
| Micro Machines (Oct 22, 1993 prototype) | 22 October 1993 | Game Gear | Racing | - |
| Micro Machines V4 (May 24, 2006 Prototype) | 24 May 2006 | PlayStation 2 | Racing | - |
| Microsoft Combat Flight Simulator: WWII Europe Series (Aug 11, 1999 prototype) | 11 August 1999 | Dreamcast | Flight Simulator | ✓ |
| Microsoft Combat Flight Simulator: WWII Europe Series (Aug 8, 2000 prototype) | 8 August 2000 | Dreamcast | Flight Simulator | ✓ |
| Microsoft Combat Flight Simulator: WWII Europe Series (Jul 30, 1999 prototype) | 30 July 1999 | Dreamcast | Flight Simulator | ✓ |
| Microsoft Combat Flight Simulator: WWII Europe Series (Nov 3, 1999 prototype) | 3 November 1999 | Dreamcast | Flight Simulator | ✓ |
| Microsoft Combat Flight Simulator: WWII Europe Series (Nov 5, 1999 prototype) | 5 November 1999 | Dreamcast | Flight Simulator | ✓ |
| Microsoft Combat Flight Simulator: WWII Europe Series (Oct 5, 1999 prototype) | 5 October 1999 | Dreamcast | Flight Simulator | ✓ |
| Microsoft Combat Flight Simulator: WWII Europe Series (Sep 27, 2000 prototype) | 27 September 2000 | Dreamcast | Flight Simulator | ✓ |
| Midnight Club: Street Racing (Oct 17, 2000 prototype) | 17 October 2000 16:06:54 | PlayStation 2 | Racing | - |
| Midtown Madness 3 (Feb 24, 2003 prototype) | 24 February 2003 11:40:56 | Xbox | Racing | - |
| Midtown Madness 3 (Feb 28, 2003 prototype) | 28 February 2003 | Xbox | Racing | - |
| Midway Arcade Treasures 2 (Aug 24, 2004 prototype) | 24 August 2004 15:12:37 | PlayStation 2 | Collection | - |
| Might and Magic II: Gates to Another World (Unreleased US Prototype) | | SNES | RPG | ✓ |
| Might and Magic IX (Late 2001 Prototype) | | PC | Role-playing | - |
| Mighty Max (Demo) | | SNES | Action | - |
| Mighty Morphin Power Rangers (Aug 10, 1994 prototype) | 10 August 1994 05:17:30 | Sega Mega Drive | Beatem Up | - |
| Mighty Morphin Power Rangers (Aug 26, 1994 prototype) | 26 August 1994 21:09:30 | Game Gear | Fighting (2D) | - |
| Mighty Morphin Power Rangers (Aug 4, 1994 prototype) | 4 August 1994 04:58:28 | Sega Mega Drive | Beatem Up | - |
| Mighty Morphin Power Rangers (Aug 8, 1994 prototype) | 8 August 1994 05:35:44 | Sega Mega Drive | Beatem Up | - |
| Mighty Morphin Power Rangers (Aug 9, 1994 prototype B) | 10 August 1994 11:25:42 | Sega Mega Drive | Beatem Up | - |
| Mighty Morphin Power Rangers (Aug 9, 1994 prototype) | 9 August 1994 04:23:18 | Sega Mega Drive | Beatem Up | - |
| Mighty Morphin Power Rangers (Jul 16, 1994 prototype) | 16 July 1994 12:22:12 | Game Gear | Fighting (2D) | - |
| Mighty Morphin Power Rangers (Jul 18, 1994 prototype) | 20 July 1994 05:38:12 | Sega Mega Drive | Beatem Up | - |
| Mighty Morphin Power Rangers (Jul 8, 1994 prototype) | 11 July 1994 09:34:08 | Sega Mega Drive | Beatem Up | - |
| Mighty Morphin Power Rangers (Sep 5, 1994 prototype) | 6 September 1994 11:32:32 | Sega Mega Drive | Beatem Up | - |
| Mighty Morphin Power Rangers - The Movie (Jul 13, 1995 prototype) | 7 July 1995 12:41:30 | Sega Mega Drive | Beatem Up | - |
| Mighty Morphin Power Rangers - The Movie (Jul 17, 1995 prototype) | 17 July 1995 21:47:06 | Sega Mega Drive | Beatem Up | - |
| Mighty Morphin Power Rangers - The Movie (Jul 22, 1995 prototype) | 21 July 1995 23:11:02 | Sega Mega Drive | Beatem Up | - |
| Mighty Morphin Power Rangers - The Movie (Jul 24, 1995 prototype) | 24 July 1995 07:06:00 | Sega Mega Drive | Beatem Up | - |
| Mighty Morphin Power Rangers - The Movie (Jul 25, 1995 prototype) | 25 July 1995 05:16:50 | Sega Mega Drive | Beatem Up | - |
| Mighty Morphin Power Rangers - The Movie (May 30, 1995 prototype) | 31 May 1995 07:13:18 | Game Gear | Fighting (2D) | - |
| Mike Tyson Heavyweight Boxing (Feb 5, 2002 prototype) | 5 February 2002 16:10:00 | PlayStation 2 | Fighting | - |
| Mile High Pinball (Jul 8, 2005 prototype) | 8 July 2005 | N-Gage | Pinball | - |
| Millennium Racer: Y2K Fighters (Jun 4, 2001 prototype) | 4 June 2001 20:37:34 | Dreamcast | Racing | ✓ |
| Mind Quest (Aug 3, 1993 prototype) | 3 August 1993 | Philips CD-i | | - |
| Minecraft (Indev February 3, 2010) | 3 February 2010 05:30:44 | PC | | - |
| Mini Racers (Prototype) | | Nintendo 64 | Racing | ✓ |
| Miracle Warriors: Seal of the Dark Lord (Prototype) | | Sega Master System | Role Playing | - |
| Mirage (Jun 23, 2004 prototype) | 23 June 2004 | PlayStation 2 | Action | ✓ |
| Missile Command (Aug 12, 1999 prototype) | 12 August 1999 16:00:00 | PlayStation | Action | - |
| Missile Command VR (Jul 5, 1995 prototype) | 5 July 1995 | Atari Jaguar | Shooter | ✓ |
| Missle Defense 3-D (Prototype) | | Sega Master System | Shooter | - |
| Modi i Nanna: Sprytne Smyki (Aug 27, 2002 Demo) | 27 August 2002 04:00:00 | PC | Platformer | - |
| Monaco Grand Prix (Jan 6, 1999 prototype) | 6 January 1999 20:04:58 | Dreamcast | Racing | - |
| Monaco Grand Prix: Racing Simulation 2 (Mar 28, 1999 Demo) | 28 March 1999 | PlayStation | Racing | - |
| Monday Night Combat (Nov 1, 2010 prototype) | 1 November 2010 | Xbox 360 | Third-person shooter | - |
| Monday Night Combat (Oct 19, 2010 prototype) | 19 October 2010 | Xbox 360 | Third-person shooter | - |
| Monday Night Combat (Oct 24, 2010 prototype) | 24 October 2010 | Xbox 360 | Third-person shooter | - |
| Mondu's Fight Palace (Jul 3, 1990 prototype) | 3 July 1990 18:05:48 | Sega Mega Drive | Fighter | - |
| Monopoly (Prototype) | | Sega Master System | Board game | - |
| Monster House (Apr 15, 2006 prototype) | 15 April 2006 17:51:00 | PlayStation 2 | Survival Horror | - |
| Monster Rancher DS (Prototype) | | Nintendo DS | Life simulation | - |
| Monster in My Pocket (Apr 22, 1991 prototype) | 22 April 1991 | NES | Action | - |
| Monsters, Inc. (Dec 14, 2001 prototype) | | PlayStation 2 | Action | - |
| Montezuma's Revenge (Prototype) | | Sega Master System | Action | - |
| Monty Python's Invasion from the Planet Skyron (May 15, 1995 prototype) | 15 May 1995 | Philips CD-i | | - |
| Mortal Kombat 3 (Aug 1, 1995 prototype) | 1 August 1995 | SNES | Fighting | - |
| Mortal Kombat 3 (Jul 13, 1995 prototype) | 13 July 1995 | SNES | Fighting | - |
| Mortal Kombat 4 (Apr 2, 1998 prototype) | 2 April 1998 09:06:12 | PlayStation | Fighting | - |
| Mortal Kombat Gold (Aug 28, 1999 prototype) | 28 August 1999 13:45:34 | Dreamcast | Fighting | - |
| Mortal Kombat II (Jan 2, 1996 build) | | Sega Saturn | Fighting | - |
| Mortal Kombat Trilogy (Apr 1, 1996 prototype) | 1 April 1996 18:36:00 | Nintendo 64 | Fighting | - |
| Mortal Kombat Trilogy (Aug 26, 1996 prototype) | 26 August 1996 18:46:26 | PlayStation | Fighting | - |
| Mortal Kombat Trilogy (May 13, 1996 prototype) | 13 May 1996 14:56:00 | Nintendo 64 | Fighting | - |
| Mortal Kombat: Deception (Aug 29, 2004 prototype) | 29 August 2004 22:23:34 | Xbox | Fighting | - |
| Mortal Kombat: Shaolin Monks (May 15, 2005 prototype) | 15 May 2005 | Xbox | Fighting | - |
| Mortal Kombat: Shaolin Monks (May 16, 2005 prototype) | 16 May 2005 03:54:00 | PlayStation 2 | Fighting | - |
| Mortal Kombat: Special Forces (May 10, 2000 prototype) | 10 May 2000 17:33:00 | PlayStation | Action-adventure, beat 'em up | - |
| Mortal Kombat: Special Forces (May 11, 1999 prototype) | 11 May 1999 17:33:00 | PlayStation | Action-adventure, beat 'em up | - |
| MotoGP (Feb 1, 2005 Italian Master) | 1 February 2005 11:45:00 | PC | Racing | - |
| MotoGP (Feb 1, 2005 Spanish Master) | 1 February 2005 11:57:00 | PC | Racing | - |
| MotoGP 2 (May 2, 2003 prototype) | 2 May 2003 12:23:29 | PC | Racing | - |
| MotoGP 3: Ultimate Racing Technology (Mar 16, 2004 prototype) | 16 March 2004 17:30:00 | PC | Racing | - |
| MotoGP 3: Ultimate Racing Technology (Mar 31, 2004 prototype) | 31 March 2004 12:49:03 | PC | Racing | - |
| MotoGP 4 (Mar 23, 2005 prototype) | 23 March 2005 11:51:12 | PlayStation 2 | Racing | - |
| Motocross Championship (Nov 1, 1994 prototype) | 1 November 1994 17:45:58 | Sega 32X | Racing | - |
| Motocross Championship (Nov 11, 1994 prototype) | 11 November 1994 14:09:34 | Sega 32X | Racing | - |
| Motocross Championship (Nov 2, 1994 prototype B) | 3 November 1994 10:41:26 | Sega 32X | Racing | - |
| Motocross Championship (Nov 2, 1994 prototype) | 2 November 1994 18:02:30 | Sega 32X | Racing | - |
| Motocross Championship (Nov 3, 1994 prototype) | 3 November 1994 16:04:30 | Sega 32X | Racing | - |
| Motocross Championship (Nov 4, 1994 prototype) | 4 November 1994 16:14:30 | Sega 32X | Racing | - |
| Motocross Championship (Nov 7, 1994 prototype) | 7 November 1994 16:03:10 | Sega 32X | Racing | - |
| Motocross Championship (Nov 8, 1994 prototype) | 8 November 1994 16:14:36 | Sega 32X | Racing | - |
| Motocross Championship (Oct 12, 1994 prototype) | 12 October 1994 10:34:34 | Sega 32X | Racing | - |
| Motocross Championship (Oct 17, 1994 prototype) | 17 October 1994 16:45:02 | Sega 32X | Racing | - |
| Motocross Championship (Oct 18, 1994 prototype) | 18 October 1994 15:28:14 | Sega 32X | Racing | - |
| Motocross Championship (Oct 19, 1994 prototype) | 19 October 1994 16:41:24 | Sega 32X | Racing | - |
| Motocross Championship (Oct 20, 1994 prototype) | 20 October 1994 17:04:58 | Sega 32X | Racing | - |
| Motocross Championship (Oct 24, 1994 prototype) | 24 October 1994 14:09:32 | Sega 32X | Racing | - |
| Motocross Championship (Oct 28, 1994 prototype) | 28 October 1994 11:22:42 | Sega 32X | Racing | - |
| Mr. Bloopy: Saves the World (Feb 16, 1995 prototype) | 16 February 1995 | SNES | Platform | ✓ |
| Mr. Bloopy: Saves the World (Jun 21, 1994 18.15 prototype) | 21 June 1994 18:15:00 | SNES | Platform | ✓ |
| Mr. Bloopy: Saves the World (Jun 21, 1994 prototype) | 21 June 1994 | SNES | Platform | ✓ |
| Mr. Bloopy: Saves the World (Jun 22, 1994 prototype) | 22 June 1994 | SNES | Platform | ✓ |
| Mr. Driller (prototype) | | Dreamcast | Puzzle | - |
| Mr. Nutz (Jun 10, 1993 prototype) | 10 June 1993 | SNES | Platformer | - |
| Mr. Nutz Hoppin' Mad (Jul 20, 1994 prototype) | 20 July 1994 14:42:54 | Sega Mega Drive | Platform | ✓ |
| Mr. Tuff (Dec 5, 1994 prototype) | 5 December 1994 14:34:00 | SNES | Action | ✓ |
| Ms. Pac-Man (Jun 18, 1996 prototype) | 18 June 1996 | SNES | Arcade | - |
| Muppets On the Go! (Jul 21, 1995 prototype) | 21 July 1995 | Sega Pico | Education | - |
| Muppets On the Go! (Mar 1, 1996 prototype) | 1 March 1996 | Sega Pico | Education | - |
| Muppets On the Go! (Mar 13, 1996 prototype) | 13 March 1996 | Sega Pico | Education | - |
| Muppets On the Go! (Mar 22, 13.37 1996 prototype) | 22 March 1996 | Sega Pico | Education | - |
| Muppets On the Go! (Mar 22, 1996 prototype) | 22 March 1996 | Sega Pico | Education | - |
| Muppets On the Go! (Mar 29, 1996 prototype) | 29 March 1996 | Sega Pico | Education | - |
| Muppets On the Go! (Mar 30, 1996 02.19 prototype) | 30 March 1996 | Sega Pico | Education | - |
| Muppets On the Go! (Mar 30, 1996 prototype) | 30 March 1996 | Sega Pico | Education | - |
| Musical Zoo (Dec 20, 1994 prototype) | 20 December 1994 20:19:20 | Sega Pico | Educational | - |
| Musical Zoo (Feb 17, 1995 prototype B) | 17 February 1995 16:17:16 | Sega Pico | Educational | - |
| Musical Zoo (Feb 17, 1995 prototype) | 17 February 1995 16:03:10 | Sega Pico | Educational | - |
| Musical Zoo (Feb 8, 1995 prototype) | 9 February 1995 19:41:54 | Sega Pico | Educational | - |
| Musical Zoo (Feb 9, 1995 prototype) | 9 February 1995 18:30:24 | Sega Pico | Educational | - |
| Musical Zoo (Jan 4, 1995 prototype) | 4 January 1995 17:41:44 | Sega Pico | Educational | - |
| Musical Zoo (Jan 5, 1995 prototype) | 5 January 1995 18:24:52 | Sega Pico | Educational | - |
| Mutant Rampage Body Slam (Aug 5, 1994 prototype) | 5 August 1994 | Philips CD-i | FMV | - |
| Muzzy (Jul 14, 1994 prototype) | 14 July 1994 | Philips CD-i | FMV | - |
| Mystic Defender (Sep 14, 1989 prototype) | 14 September 1989 17:02:38 | Sega Mega Drive | Action | - |
| Mythri | | Game Boy Color | Role Playing | ✓ |
| Mánager de Liga (Feb 22, 2000 prototype) | 22 February 2000 | PlayStation | Football management | - |
| NASCAR Racing 5 (Dec 10, 2003 prototype) | 10 December 2003 17:40:10 | Xbox | Racing | ✓ |
| NBA 2K (Dec 21, 1999 prototype) | 21 December 1999 12:11:48 | Dreamcast | Sports - Basketball | - |
| NBA 2K (Sep 22, 1999 prototype) | 22 September 1999 23:53:24 | Dreamcast | Sports - Basketball | - |
| NBA 2K (prototype) | | Dreamcast | Sports | - |
| NBA Action '95 (Dec 15, 1994 prototype) | 16 December 1994 04:28:28 | Sega Mega Drive | Sports - Basketball | - |
| NBA Action '95 (Dec 2, 1994 prototype B) | 3 December 1994 13:51:34 | Sega Mega Drive | Sports - Basketball | - |
| NBA Action '95 (Dec 22, 1994 prototype A) | 22 January 1995 11:47:24 | Sega Mega Drive | Sports - Basketball | - |
| NBA Action '95 (Dec 24, 1994 prototype A) | 24 January 1995 17:15:08 | Sega Mega Drive | Sports - Basketball | - |
| NBA Action '95 (Dec 29, 1994 prototype) | 29 January 1995 11:09:54 | Sega Mega Drive | Sports - Basketball | - |
| NBA Action '95 (Dec 30, 1994 prototype) | 30 December 1994 14:34:52 | Sega Mega Drive | Sports - Basketball | - |
| NBA Action '95 (Dec 31, 1994 prototype) | 31 January 1995 14:40:56 | Sega Mega Drive | Sports - Basketball | - |
| NBA Action '95 (Dec 9, 1994 prototype) | 9 December 1994 17:31:26 | Sega Mega Drive | Sports - Basketball | - |
| NBA Action '95 (Feb 1, 1995 prototype) | 1 February 1995 00:03:32 | Sega Mega Drive | Sports - Basketball | - |
| NBA Action '95 (Feb 2, 1995 prototype) | 1 February 1995 11:48:42 | Sega Mega Drive | Sports - Basketball | - |
| NBA Action '95 (Jan 12, 1995 prototype) | 12 January 1995 17:55:34 | Sega Mega Drive | Sports - Basketball | - |
| NBA Action '95 (Jan 15, 1995 prototype A) | 15 January 1995 14:20:44 | Sega Mega Drive | Sports - Basketball | - |
| NBA Action '95 (Jan 18, 1995 prototype) | 18 January 1995 13:46:40 | Sega Mega Drive | Sports - Basketball | - |
| NBA Action '95 (Jan 21, 1995 prototype) | 21 January 1995 19:30:12 | Sega Mega Drive | Sports - Basketball | - |
| NBA Action '95 (Jan 22, 1995 prototype B) | 22 January 1995 18:32:48 | Sega Mega Drive | Sports - Basketball | - |
| NBA Action '95 (Jan 24, 1995 prototype B) | 24 January 1995 20:16:14 | Sega Mega Drive | Sports - Basketball | - |
| NBA Action '95 (Jan 27, 1995 prototype A) | 27 January 1995 10:09:00 | Sega Mega Drive | Sports - Basketball | - |
| NBA Action '95 (Jan 27, 1995 prototype B) | 27 January 1995 15:36:44 | Sega Mega Drive | Sports - Basketball | - |
| NBA Action '95 (Jan 28, 1995 prototype A) | 26 January 1995 17:21:22 | Sega Mega Drive | Sports - Basketball | - |
| NBA Action '95 (Jan 28, 1995 prototype) | 28 January 1995 09:10:12 | Sega Mega Drive | Sports - Basketball | - |
| NBA Action '95 (Jan 3, 1995 prototype) | 3 January 1995 17:06:48 | Sega Mega Drive | Sports - Basketball | - |
| NBA Action '95 (Jan 30, 1995 prototype) | 30 January 1995 00:32:20 | Sega Mega Drive | Sports - Basketball | - |
| NBA Action '95 (Jan 8, 1995 prototype) | 8 January 1995 14:22:46 | Sega Mega Drive | Sports - Basketball | - |
| NBA Action '95 (Nov 18, 1994 prototype) | 21 November 1994 13:04:22 | Sega Mega Drive | Sports - Basketball | - |
| NBA Action '95 (Nov 23, 1994 prototype A) | 23 November 1994 15:29:04 | Sega Mega Drive | Sports - Basketball | - |
| NBA Action (Jan 16, 1994 prototype) | 14 January 1994 18:41:34 | Sega Mega Drive | Sports - Basketball | - |
| NBA Action (Jan 4, 1994 prototype) | 4 January 1994 09:57:30 | Sega Mega Drive | Sports - Basketball | - |
| NBA Action Starring David Robinson (Dec 1, 1993 prototype) | 1 December 1993 15:26:36 | Game Gear | Sports - Basketball | - |
| NBA Action Starring David Robinson (Feb 12, 1994 prototype) | 12 February 1994 18:38:26 | Game Gear | Sports - Basketball | - |
| NBA Action Starring David Robinson (Feb 15, 1994 prototype) | 15 February 1994 18:28:00 | Game Gear | Sports - Basketball | - |
| NBA Action Starring David Robinson (Feb 17, 1994 prototype) | 17 February 1994 18:42:48 | Game Gear | Sports - Basketball | - |
| NBA Action Starring David Robinson (Feb 2, 1994 prototype) | 2 February 1994 18:57:10 | Game Gear | Sports - Basketball | - |
| NBA Action Starring David Robinson (Feb 20, 1994 prototype) | 20 February 1994 19:32:14 | Game Gear | Sports - Basketball | - |
| NBA Action Starring David Robinson (Feb 21, 1994 prototype) | 22 February 1994 01:36:34 | Game Gear | Sports - Basketball | - |
| NBA Action Starring David Robinson (Feb 24, 1994 prototype) | 24 February 1994 02:42:36 | Game Gear | Sports - Basketball | - |
| NBA Action Starring David Robinson (Feb 25, 1994 prototype B) | 25 February 1994 18:27:38 | Game Gear | Sports - Basketball | - |
| NBA Action Starring David Robinson (Feb 25, 1994 prototype) | 25 February 1994 06:15:38 | Game Gear | Sports - Basketball | - |
| NBA Action Starring David Robinson (Feb 26, 1994 prototype) | 26 February 1994 02:28:38 | Game Gear | Sports - Basketball | - |
| NBA Action Starring David Robinson (Feb 27, 1994 prototype) | 27 February 1994 10:05:46 | Game Gear | Sports - Basketball | - |
| NBA Action Starring David Robinson (Feb 28, 1994 prototype A) | 28 February 1994 14:38:16 | Game Gear | Sports - Basketball | - |
| NBA Action Starring David Robinson (Feb 28, 1994 prototype) | 28 February 1994 07:12:40 | Game Gear | Sports - Basketball | - |
| NBA Action Starring David Robinson (Feb 3, 1994 prototype) | 3 February 1994 15:52:04 | Game Gear | Sports - Basketball | - |
| NBA Action Starring David Robinson (Feb 6, 1994 prototype) | 6 February 1994 12:28:42 | Game Gear | Sports - Basketball | - |
| NBA Action Starring David Robinson (Feb 8, 1994 prototype) | 8 February 1994 19:27:26 | Game Gear | Sports - Basketball | - |
| NBA Action Starring David Robinson (Jan 10, 1994 prototype) | 10 January 1994 11:51:58 | Game Gear | Sports - Basketball | - |
| NBA Action Starring David Robinson (Jan 24, 1994 prototype) | 24 January 1994 12:50:06 | Game Gear | Sports - Basketball | - |
| NBA Action Starring David Robinson (Jan 29, 1994 prototype) | 29 January 1994 16:56:34 | Game Gear | Sports - Basketball | - |
| NBA Action Starring David Robinson (Jan 4, 1994 prototype) | 4 January 1994 16:18:44 | Game Gear | Sports - Basketball | - |
| NBA Action Starring David Robinson (Jan 6, 1994 prototype) | 6 January 1994 17:24:38 | Game Gear | Sports - Basketball | - |
| NBA Action Starring David Robinson (Mar 1, 1994 prototype) | 1 March 1994 11:05:20 | Game Gear | Sports - Basketball | - |
| NBA Action Starring David Robinson (Mar 11, 1994 prototype) | 15 March 1994 08:26:40 | Game Gear | Sports - Basketball | - |
| NBA Action Starring David Robinson (Mar 2, 1994 prototype) | 2 March 1994 11:24:24 | Game Gear | Sports - Basketball | - |
| NBA Action Starring David Robinson (Mar 3, 1994 prototype) | 3 March 1994 03:38:44 | Game Gear | Sports - Basketball | - |
| NBA Action Starring David Robinson (Mar 4, 1994 prototype F) | 4 March 1994 20:51:52 | Game Gear | Sports - Basketball | - |
| NBA Action Starring David Robinson (Mar 4, 1994 prototype) | 4 March 1994 02:14:44 | Game Gear | Sports - Basketball | - |
| NBA Action Starring David Robinson (Mar 5, 1994 prototype) | 5 March 1994 22:51:26 | Game Gear | Sports - Basketball | - |
| NBA Action Starring David Robinson (Mar 8, 1994 prototype) | 8 March 1994 19:40:58 | Game Gear | Sports - Basketball | - |
| NBA Action Starring David Robinson (Nov 28, 1993 prototype) | 28 November 1993 19:17:10 | Game Gear | Sports - Basketball | - |
| NBA Hoopz (Jan 9, 2001 prototype) | 9 January 2001 15:19:10 | Dreamcast | Sports - Basketball | - |
| NBA Jam (Apr 1993 prototype) | | Sega Mega Drive | Sports - Basketball | - |
| NBA Jam Sega Master System (Prototype) | | Sega Master System | Sports - Basketball | ✓ |
| NBA Jam XXX | | SNES | Sports - Basketball | - |
| NBA Live 06 (Aug 11, 2005 prototype) | 11 August 2005 | Xbox | Sports | - |
| NBA Live 06 (Jul 8, 2005 prototype) | 8 July 2005 21:34:44 | PlayStation 2 | Sports | - |
| NFL '95 (Aug 1, 1994 prototype) | 2 August 1994 11:37:48 | Sega Mega Drive | Sports - Football | - |
| NFL '95 (Aug 10, 1994 prototype) | 10 August 1994 17:14:44 | Sega Mega Drive | Sports - Football | - |
| NFL '95 (Aug 12, 1994 prototype) | 12 August 1994 13:31:04 | Sega Mega Drive | Sports - Football | - |
| NFL '95 (Aug 17, 1994 prototype B) | 17 August 1994 17:44:02 | Sega Mega Drive | Sports - Football | - |
| NFL '95 (Aug 17, 1994 prototype) | 17 August 1994 02:09:46 | Sega Mega Drive | Sports - Football | - |
| NFL '95 (Aug 22, 1994 prototype) | 22 August 1994 12:19:42 | Sega Mega Drive | Sports - Football | - |
| NFL '95 (Aug 30, 1994 prototype) | 30 August 1994 14:15:16 | Sega Mega Drive | Sports - Football | - |
| NFL '95 (Aug 31, 1994 prototype) | 31 August 1994 05:41:58 | Sega Mega Drive | Sports - Football | - |
| NFL '95 (Aug 5, 1994 prototype) | 5 August 1994 07:53:50 | Sega Mega Drive | Sports - Football | - |
| NFL '95 (Sep 1, 1994 prototype) | 1 September 1994 03:50:18 | Sega Mega Drive | Sports - Football | - |
| NFL '95 (Sep 11, 1994 prototype B) | 11 September 1994 20:24:26 | Sega Mega Drive | Sports - Football | - |
| NFL '95 (Sep 11, 1994 prototype) | 11 September 1994 09:38:52 | Sega Mega Drive | Sports - Football | - |
| NFL '95 (Sep 2, 1994 prototype) | 4 September 1994 06:15:04 | Sega Mega Drive | Sports - Football | - |
| NFL '95 (Sep 4, 1994 prototype) | 4 September 1994 09:57:00 | Sega Mega Drive | Sports - Football | - |
| NFL '95 (Sep 5, 1994 prototype B) | 5 September 1994 17:42:46 | Sega Mega Drive | Sports - Football | - |
| NFL '95 (Sep 5, 1994 prototype) | 5 September 1994 07:13:46 | Sega Mega Drive | Sports - Football | - |
| NFL '95 (Sep 6, 1994 prototype) | 6 September 1994 07:27:06 | Sega Mega Drive | Sports - Football | - |
| NFL '95 (Sep 7, 1994 prototype) | 7 September 1994 19:54:56 | Sega Mega Drive | Sports - Football | - |
| NFL '95 (Sep 8, 1994 prototype) | 8 September 1994 06:23:12 | Sega Mega Drive | Sports - Football | - |
| NFL '95 (Sep 9, 1994 prototype) | 9 September 1994 21:51:16 | Sega Mega Drive | Sports - Football | - |
| NFL '95 Game Gear (Aug 25, 1994 prototype A) | 25 August 1994 06:17:16 | Game Gear | Sports - Football | - |
| NFL '95 Game Gear (Aug 25, 1994 prototype) | 25 August 1994 07:28:28 | Game Gear | Sports - Football | - |
| NFL '95 Game Gear (Aug 26, 1994 prototype) | 26 August 1994 09:51:06 | Game Gear | Sports - Football | - |
| NFL '95 Game Gear (Aug 31, 1994 prototype) | 31 August 1994 11:50:32 | Game Gear | Sports - Football | - |
| NFL '95 Game Gear (Aug 8, 1994 prototype) | 8 August 1994 16:38:56 | Game Gear | Sports - Football | - |
| NFL '95 Game Gear (Sep 10, 1994 prototype) | 10 September 1994 22:25:36 | Game Gear | Sports - Football | - |
| NFL '95 Game Gear (Sep 11, 1994 prototype B) | 11 September 1994 11:56:04 | Game Gear | Sports - Football | - |
| NFL '95 Game Gear (Sep 11, 1994 prototype C) | 11 September 1994 16:26:50 | Game Gear | Sports - Football | - |
| NFL '95 Game Gear (Sep 12, 1994 prototype) | 12 September 1994 15:10:34 | Game Gear | Sports - Football | - |
| NFL '95 Game Gear (Sep 14, 1994 prototype F) | 14 September 1994 13:26:08 | Game Gear | Sports - Football | - |
| NFL '95 Game Gear (Sep 14, 1994 prototype) | 14 September 1994 06:35:50 | Game Gear | Sports - Football | - |
| NFL '95 Game Gear (Sep 2, 1994 prototype) | 2 September 1994 12:28:06 | Game Gear | Sports - Football | - |
| NFL '95 Game Gear (Sep 8, 1994 prototype) | 8 September 1994 11:57:20 | Game Gear | Sports - Football | - |
| NFL Blitz 2000 (Sep 8, 1999 prototype) | 8 September 1999 12:02:56 | Dreamcast | Sports - Football | - |
| NFL Football '94 (Nov 4, 1993 build) | 4 November 1993 08:52:52 | Sega Mega Drive | Sports | - |
| NFL GameDay 2004 (Jul 29, 2003 prototype) | 29 July 2003 13:17:20 | PlayStation 2 | Sports - Football | - |
| NFL Hall of Fame Football (Oct 7, 1994 prototype) | 7 October 1994 | Philips CD-i | FMV | - |
| NGen Racing (Apr 3, 2000 prototype) | 3 April 2000 13:09:12 | PlayStation | Racing | - |
| NGen Racing (May 2, 2000 prototype) | 3 April 2000 13:09:12 | PlayStation | Racing | - |
| NHL 2K (Mar 21, 2000 prototype) | 21 March 2000 16:39:48 | Dreamcast | Sports - Hockey | - |
| NHL All-Star Hockey '95 (Dec 1, 1994 prototype B) | 1 December 1994 21:34:18 | Sega Mega Drive | Sports - Hockey | - |
| NHL All-Star Hockey '95 (Dec 1, 1994 prototype) | 1 December 1994 10:38:12 | Sega Mega Drive | Sports - Hockey | - |
| NHL All-Star Hockey '95 (Dec 2, 1994 prototype) | 2 December 1994 14:32:38 | Sega Mega Drive | Sports - Hockey | - |
| NHL All-Star Hockey '95 (Nov 19, 1994 prototype) | 20 November 1994 18:30:32 | Sega Mega Drive | Sports - Hockey | - |
| NHL All-Star Hockey '95 (Nov 21, 1994 prototype) | 21 November 1994 19:25:10 | Sega Mega Drive | Sports - Hockey | - |
| NHL All-Star Hockey '95 (Nov 22, 1994 prototype) | 22 November 1994 18:19:36 | Sega Mega Drive | Sports - Hockey | - |
| NHL All-Star Hockey '95 (Nov 23, 1994 prototype) | 23 November 1994 14:10:48 | Sega Mega Drive | Sports - Hockey | - |
| NHL All-Star Hockey '95 (Nov 27, 1994 prototype) | 27 November 1994 21:01:38 | Sega Mega Drive | Sports - Hockey | - |
| NHL All-Star Hockey '95 (Nov 28, 1994 prototype) | 28 November 1994 18:39:26 | Sega Mega Drive | Sports - Hockey | - |
| NHL All-Star Hockey '95 (Nov 29, 1994 prototype) | 29 November 1994 21:57:32 | Sega Mega Drive | Sports - Hockey | - |
| NHL All-Star Hockey '95 (Nov 7, 1994 prototype) | 9 November 1994 19:50:50 | Sega Mega Drive | Sports - Hockey | - |
| NHL All-Star Hockey '95 (Nov 9, 1994 prototype) | 9 November 1994 17:02:30 | Sega Mega Drive | Sports - Hockey | - |
| NHL All-Star Hockey '95 (Oct 1, 1994 prototype) | 1 October 1994 17:48:04 | Sega Mega Drive | Sports - Hockey | - |
| NHL All-Star Hockey '95 (Oct 21, 1994 prototype) | 24 October 1994 14:15:42 | Sega Mega Drive | Sports - Hockey | - |
| NHL All-Star Hockey '95 (Sep 14, 1994 prototype) | 21 September 1994 10:21:16 | Sega Mega Drive | Sports - Hockey | - |
| NHL All-Star Hockey '95 (Sep 29, 1994 prototype) | 29 September 1994 16:12:06 | Sega Mega Drive | Sports - Hockey | - |
| NHL All-Star Hockey (Aug 10, 1995 prototype) | 10 August 1995 18:35:38 | Sega Saturn | Sports - Hockey | ✓ |
| NHL All-Star Hockey (Dec 15, 1994 prototype) | 14 December 1994 21:49:12 | Game Gear | Sports - Hockey | - |
| NHL All-Star Hockey (Dec 22, 1994 prototype) | 22 December 1994 03:37:22 | Game Gear | Sports - Hockey | - |
| NHL All-Star Hockey (Dec 29, 1994 prototype) | 29 December 1994 15:35:42 | Game Gear | Sports - Hockey | - |
| NHL All-Star Hockey (Dec 31, 1994 prototype) | 30 December 1994 19:43:04 | Game Gear | Sports - Hockey | - |
| NHL All-Star Hockey (Jan 11, 1995 prototype) | 12 January 1995 02:40:16 | Game Gear | Sports - Hockey | - |
| NHL All-Star Hockey (Jan 13, 1995 prototype) | 13 January 1995 20:02:32 | Game Gear | Sports - Hockey | - |
| NHL All-Star Hockey (Jan 16, 1995 prototype) | 16 January 1995 18:07:08 | Game Gear | Sports - Hockey | - |
| NHL All-Star Hockey (Jan 2, 1995 prototype) | 2 January 1995 11:58:40 | Game Gear | Sports - Hockey | - |
| NHL All-Star Hockey (Jan 20, 1995 prototype) | 20 January 1995 16:41:40 | Game Gear | Sports - Hockey | - |
| NHL All-Star Hockey (Jan 21, 1995 prototype) | 21 January 1995 22:11:14 | Game Gear | Sports - Hockey | - |
| NHL All-Star Hockey (Jan 24, 1995 prototype A) | 24 January 1995 21:33:54 | Game Gear | Sports - Hockey | - |
| NHL All-Star Hockey (Jan 24, 1995 prototype B) | 24 January 1995 18:18:44 | Game Gear | Sports - Hockey | - |
| NHL All-Star Hockey (Jan 24, 1995 prototype C) | 24 January 1995 23:02:04 | Game Gear | Sports - Hockey | - |
| NHL All-Star Hockey (Jan 24, 1995 prototype) | 24 January 1995 14:44:00 | Game Gear | Sports - Hockey | - |
| NHL All-Star Hockey (Jan 25, 1995 prototype) | 25 January 1995 22:03:14 | Game Gear | Sports - Hockey | - |
| NHL All-Star Hockey (Jan 26, 1995 prototype) | 26 January 1995 17:42:56 | Game Gear | Sports - Hockey | - |
| NHL All-Star Hockey (Jan 3, 1995 prototype) | 3 January 1995 22:54:50 | Game Gear | Sports - Hockey | - |
| NHL All-Star Hockey (Jan 7, 1995 prototype) | 7 January 1995 22:57:42 | Game Gear | Sports - Hockey | - |
| NHL Hockey (Aug 4, 1993 prototype) | 4 August 1993 | PC | Sports | - |
| NHLPA Hockey 93 (Alternate build) | | Sega Mega Drive | Sports - Hockey | - |
| NUS-64 | | | Hardware Diagnostics | - |
| Namco Museum (E3 prototype) | | Nintendo GameCube | Compilation | - |
| Nancy Drew: Mysteries Adventure (prototype) | 14 September 2007 13:52:10 | Nintendo DS | | ✓ |
| Nanobreaker (Sep 16, 2004 prototype) | 16 September 2004 | PlayStation 2 | Action | - |
| Nazo Puyo: Arle no Roux (Prototype) | | Game Gear | Puzzle | - |
| Need For Speed: ProStreet (Oct 4, 2007 prototype) | 4 October 2007 | PlayStation 2 | Racing | - |
| Need for Speed 2 (Feb 24, 1997 prototype) | 24 February 1997 00:24:04 | PlayStation | Racing | - |
| Need for Speed Underground (Sep 10, 2003 prototype) | 10 September 2003 | Nintendo GameCube | Racing | - |
| Need for Speed Underground (Sep 2, 2003 prototype) | 5 September 2003 10:35:28 | PlayStation 2 | Racing | - |
| Need for Speed: High Stakes (Feb 23, 1999 prototype) | 23 February 1999 00:05:16 | PlayStation | Racing | - |
| Need for Speed: Most Wanted (Oct 12, 2005 prototype) | 12 October 2005 01:27:46 | PlayStation 2 | Racing | - |
| Need for Speed: Most Wanted (Sep 20, 2005 prototype) | 20 September 2005 10:46:48 | PlayStation 2 | Racing | - |
| Need for Speed: Nitro (Aug 14, 2009 prototype) | 14 August 2009 | Nintendo DS | Racing | - |
| Need for Speed: ProStreet (Dec 6, 2007 prototype) | 6 December 2007 03:48:17 | PlayStation Portable | Racing | - |
| Neo Baccarat (Prototype) | | Neo Geo Pocket Color | Gambling | - |
| Neo Cherry Master Color: Real Casino Series (Prototype) | | Neo Geo Pocket Color | Gambling | - |
| Neo Contra (Apr 23, 2004 prototype) | 23 April 2004 16:12:25 | PlayStation 2 | Run and gun | - |
| Neo Contra (Aug 17, 2004 prototype) | 17 August 2004 14:30:54 | PlayStation 2 | Run and gun | - |
| New Ghostbusters II (USA Prototype) | | NES | Action | ✓ |
| New Yatterman: Nandai Kandai Yajirobee (Satellaview) | 5 May 1996 | Satellaview | Board game | - |
| NiGHTS into Dreams (May 14, 1996 prototype) | 14 May 1996 18:32:35 | Sega Saturn | Platformer | - |
| Nicktoons Racing (May 21, 2001 Review) | | PlayStation | Racing | - |
| Night Trap (Sep 21, 1992 prototype) | 21 September 1992 19:27:25 | Sega CD | FMV | - |
| Nightmare Busters (Prototype) | | SNES | Action | ✓ |
| Nightmare Circus prototype | | Sega Mega Drive | Action Platformer | - |
| Nightmare Creatures II (Jul 21, 2000 prototype) | 21 July 2000 20:51:32 | Dreamcast | Action | - |
| Nightmare Creatures II (Mar 13, 2000 prototype) | 13 March 2000 17:54:33 | PlayStation | Survival Horror | - |
| Nightmare Creatures II (May 9, 2000 prototype) | 9 May 2000 | Dreamcast | Survival Horror | - |
| Nightmare Creatures II (prototype) | | Dreamcast | Survival Horror | - |
| Niko-Chan Battle (Prototype) | | Virtual Boy | Action | ✓ |
| Ninja Burai Densetsu (May 28, 1991 prototype) | 28 May 1991 11:43:36 | Sega Mega Drive | Simulation | - |
| Ninja Gaiden (Mega Drive Prototype) | | Sega Mega Drive | Beat 'em up | ✓ |
| Ninja Gaiden (NES Prototype) | | NES | Action | - |
| Ninja Gaiden (Prototype) | | Sega Master System | Action | - |
| Ninja Gaiden II (Mar 20, 2008 prototype) | 20 March 2008 | Xbox 360 | Action-adventure, hack and slash | - |
| Ninja Gaiden II: The Dark Sword of Chaos (Jan 18, 1990 prototype) | 18 January 1990 | NES | Action | - |
| Ninja Grannies (Prototype) | | Amstrad CPC | Action | ✓ |
| Ninja Hattori-kun (prototype) | | NES | Platform | - |
| Ninja Jajamaru: Ginga Daisakusen (Prototype) | | NES | Action | - |
| Ninja Taro (Prototype) | | Game Boy | Action-adventure | - |
| Ninja: Shadow of Darkness (Aug 26, 1998 prototype) | 26 August 1998 00:52:48 | PlayStation | Action | - |
| Nintendo E3 1999 (Press CD) | | PC | | - |
| Nintendo E3 2000 (Press CD) | | PC | | - |
| Nintendo GameCube Service Disc (Version 1.0-03) | | | Hardware Diagnostics | - |
| Nintendo SpaceWorld 2000 (Press CD) | | PC | | - |
| Nippon Mukasi Banasi prototype | | Sega Pico | Educational | - |
| Nyuushi Chokuzen Check Nanmon Kimon Kiki Kaikai | | Sega Mega Drive | Quiz | - |
| O.D.T. - Escape... Or Die Trying (PAL prototype) | | Nintendo 64 | Action | ✓ |
| O.D.T. - Escape... Or Die Trying (US prototype) | | Nintendo 64 | Action | ✓ |
| Oddworld: Abe's Exoddus (Jul 14, 1998 prototype) | 14 July 1998 12:20:00 | PlayStation | | - |
| Oddworld: Abe's Exoddus (Sep 3, 1998 prototype) | 3 September 1998 13:23:36 | PlayStation | Action | - |
| Oddworld: Abe's Oddysee (Beta Patch v1.6) | 10 October 1997 20:56:14 | PC | | - |
| Oddworld: Munch's Oddysee (demo) | | Xbox | | - |
| Oddworld: Stranger's Wrath (Dec 3, 2004 prototype) | 3 December 2004 15:17:32 | Xbox | Adventure | - |
| Off the Wall (Jun 28, 1992 prototype) | 28 June 1992 | Game Gear | Puzzle | ✓ |
| Off the Wall (Prototype) | | TurboGrafx-16 | Puzzle | ✓ |
| Olympic Summer Games (Prototype) | | SNES | Sports | - |
| Omega Boost (Mar 4, 1999 prototype) | 4 March 1999 | PlayStation | | - |
| On the Ball | | SNES | Puzzle | - |
| One (Jul 25, 2005 prototype) | 25 July 2005 | N-Gage | Fighting | - |
| One (Jun 30, 2005 prototype) | 30 June 2005 | N-Gage | Fighting | - |
| One (Sep 27, 2005 prototype) | 27 September 2005 | N-Gage | Fighting | - |
| Onimusha 2: Samurai's Destiny (Jul 24, 2002 prototype) | 24 July 2002 13:05:54 | PlayStation 2 | Action | - |
| Onita Atsushi FMW (Prototype) | | SNES | Fighting | - |
| Online Pro Wrestling (Oct 24, 2003 prototype) | 24 October 2003 17:49:00 | PlayStation 2 | Wrestling | - |
| Opera Imaginaire (Nov 2, 1994 prototype) | 2 November 1994 | Philips CD-i | FMV | - |
| Operation Shadow (Aug 18, 2004 prototype) | 18 August 2004 | N-Gage | Action | - |
| Oraga Land Shusai: Best Farmer Shuukaku-Sai (Prototype) | | SNES | Puzzle | - |
| Orbatak (Prototype) | | 3DO | Action | - |
| Origami 2: Doll's House (Aug 23, 1994 prototype) | 23 August 1994 | Philips CD-i | FMV | - |
| Oswald's Invention (PC demo) | | Atari Jaguar CD | Adventure | ✓ |
| Otocky (Prototype) | | FDS | Rythm | - |
| Out Run 3-D (Prototype) | | Sega Master System | Arcade | - |
| Outrun 2 (Aug 18, 2004 prototype) | 18 August 2004 14:13:28 | Xbox | Racing | - |
| Outrun 2 (Sep 9, 2003 prototype) | 9 September 2003 | Arcade | Racing | - |
| Outtrigger (Apr 2, 2001 prototype) | 2 April 2001 | Dreamcast | FPS | - |
| Outtrigger (Mar 7, 2001 prototype) | 7 March 2001 | Dreamcast | FPS | - |
| Overlord (Apr 26, 2007 prototype) | 26 April 2007 | Xbox 360 | Action role-playing | - |
| Overlord (May 12, 2007 prototype) | 12 May 2007 | Xbox 360 | Action role-playing | - |
| Overlord II (Apr 1, 2009 prototype) | 1 April 2009 | PC | Action role-playing | - |
| Overlord II (Mar 29, 2009 prototype) | 29 May 2009 | Xbox 360 | Action role-playing | - |
| Overstorm (Prototype) | 2003 | Game Boy Advance | Action | ✓ |
| P.N.03 (May 8, 2003 prototype) | 8 May 2003 | Nintendo GameCube | Action | - |
| PBA Bowling 2001 (Jan 17, 2001 prototype) | 17 January 2001 | Dreamcast | Bowling | ✓ |
| PaRappa the Rapper (Apr 16, 2007 prototype) | 16 April 2007 14:46:08 | PlayStation Portable | Rhythm | - |
| PaRappa the Rapper 2 (Dec 6, 2001 prototype) | 6 December 2001 19:35:52 | PlayStation 2 | Rythm | - |
| PaRappa the Rapper 2 (Jul 20, 2001 build) | 20 July 2001 | PlayStation 2 | Rhythm | - |
| Pac-Man (Prototype) | | Neo Geo Pocket Color | Arcade | - |
| Pac-Man World 2 (Dec 15, 2002 prototype) | 15 December 2002 18:08:52 | PlayStation 2 | Action-adventure | - |
| Pac-in-Time (Prototype) | | Game Gear | Action | ✓ |
| Painkiller: Hell Wars (Oct 18, 2005 prototype) | 18 October 2005 | Xbox | First Person | - |
| Pandemonium (Jul 11, 2003 prototype) | 11 July 2003 | N-Gage | Action | - |
| Pandemonium! (Jul 19, 1996 prototype) | 19 July 1996 17:34:36 | PlayStation | Action | - |
| Panic! Dizzy (Prototype) | | NES | Puzzle | ✓ |
| Panorama Cotton (Nov 27, 1993 prototype) | 27 November 1993 | Sega Mega Drive | Shooter | - |
| Panzer Dragoon II Zwei (Feb 5, 1996 prototype) | 5 February 1996 20:36:35 | Sega Saturn | Rail shooter | - |
| Panzer Dragoon Orta (Dec 24, 2002 prototype) | 24 December 2002 | Xbox | Rail shooter | - |
| Panzer Dragoon Saga (Aug 26, 1997 demo) | 26 August 1997 18:44:16 | Sega Saturn | Role Playing | - |
