Prototypes by system/Nintendo Wii U

Adventure Time: Finn and Jake Investigations (Aug 24, 2015 prototype)

Dragon Quest X: Mezameshi Itsutsu no Shuzoku Online (prototype)

Extreme Exorcism (EU prototype)

Extreme Exorcism (USA prototype)

Forma.8 (EU prototype)

Forma.8 (USA prototype)

Freedom Planet (EU prototype)

Freedom Planet (USA prototype)

Just Dance 2014 (Apr 10, 2013 prototype)

Just Dance 2014 (Feb 21, 2013 prototype)

Just Dance 2014 (Mar 7, 2013 prototype)

Just Dance 2014 (May 15, 2013 prototype)

Kung Fu Panda: Showdown of Legendary Legends (Jan 7, 2016 EU Patch Data prototype)

Kung Fu Panda: Showdown of Legendary Legends (Jan 7, 2016 USA Patch Data prototype)

Lost Reavers (Multiplayer prototype)

Lovely Planet (EU prototype)

Lovely Planet (USA prototype)

Mario & Sonic at the Rio 2016 Olympic Games (Feb 11, 2016 prototype)

Mutant Mudds Super Challenge (EU prototype)

Mutant Mudds Super Challenge (USA prototype)

New Super Mario Bros. U (DLC New Super Luigi U prototype)

Rayman Legends (Jul 22, 2013 prototype)

Rive (EU prototype)

Rive (USA prototype)

Runbow (EU prototype)

Runbow (USA prototype)

Silver Falls: Ghoul Busters (prototype)

Sonic Boom: Rise of Lyric (Jul 18, 2014 prototype)

Soul Axiom (EU prototype)

Soul Axiom (USA prototype)

Splatoon (EU Patch Data prototype)

Splatoon (EU Pre-Launch Review prototype)

Splatoon (JP Patch Data prototype)

Splatoon (JP Pre-Launch Review prototype)

Splatoon (JP prototype)

Splatoon (USA Patch Data prototype)

Splatoon (USA Pre-Launch Review prototype)

Splatoon (USA prototype)

Super Mario Maker (EU Media)

Super Mario Maker (JP Media)

Super Mario Maker (USA Media)

Typoman (EU prototype)

Typoman (USA prototype)