| Chicken Run (Sep 30, 2000 prototype) | 30 September 2000 18:08:52 | PlayStation | Action Adventure | - |
| 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 | ✓ |
| Chill (Sep 30, 1997 prototype) | 30 September 1997 17:11:54 | PlayStation | Sports - Snowboarding | - |
| Chime (May 28, 2009 prototype) | 28 May 2009 | Xbox 360 | Rhythm | - |
| Chip 'N Dale: Rescue Rangers (Prototype) | | NES | Action | - |
| Chip's Challenge (v0.924B prototype) | | NES | Puzzle | ✓ |
| Choplifter HD (Aug 5, 2011 prototype) | 5 August 2011 20:38:50 | Xbox 360 | Shoot Em Up | - |
| Choplifter HD (Dec 7, 2011 prototype) | 7 December 2011 | Xbox 360 | Shoot Em Up | - |
| Choplifter III (Prototype A) | | SNES | Shoot 'Em Up | - |
| Choplifter III (Prototype B) | | SNES | Shoot 'Em Up | - |
| Choplifter! (Jul 1, 1986 prototype) | 1 July 1986 | 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 | - |
| Chrime (Jul 22, 2009 prototype) | 22 July 2009 | Xbox 360 | Rhythm | - |
| Chromehounds (May 17, 2006 prototype) | 17 May 2006 22:22:02 | Xbox 360 | Action | - |
| Chromehounds (May 31, 2006 prototype) | 31 May 2006 | Xbox 360 | Action, Strategy, Simulation | - |
| 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 | - |
| Chrono Trigger (Nov 17, 1994 prototype) | 17 November 1994 | SNES | RPG | - |
| ChuChu Rocket! (Apr 28, 2000 build) | 28 April 2000 | Dreamcast | Puzzle | - |
| ChuChu Rocket! (Jan 27, 2000 prototype) | 27 January 2000 | Dreamcast | Puzzle | - |
| Chuck E. Cheese's Party Games (May 10, 2010 prototype) | 10 May 2010 | Nintendo Wii | Simulator, minigames | - |
| Chuck Rock (Prototype) | | Game Gear | Action | - |
| Chuck Rock (prototype) | | SNES | Platformer | - |
| Chuck Yeager's Fighter Combat (Prototype) | | NES | Shooting | ✓ |
| Chucky: Wanna Play? (May 6, 2011 prototype) | 6 May 2011 17:46:22 | Xbox 360 | Action | ✓ |
| Cipher Complex (Feb 23, 2009 prototype) | 23 February 2009 18:04:37 | Xbox 360 | Stealth | ✓ |
| Cipher Complex (Nov 18, 2009 prototype) | 18 November 2009 | Xbox 360 | Stealth | ✓ |
| Circuit Breakers (Jan 23, 1998 prototype) | 23 January 1998 | PlayStation | | - |
| Circuit Breakers (Mar 31, 1998 prototype) | 31 March 1998 00:36:38 | PlayStation | Racing | - |
| Circus Maximus: Chariot Wars (Nov 16, 2001 prototype) | 16 November 2001 19:10:06 | Xbox | Racing | - |
| Citizen X (Jan 8, 1993 prototype) | 8 January 1993 11:02:37 | Sega CD | FMV | ✓ |
| City Builder (Nov 24, 2009 prototype) | 24 November 2009 | Nintendo Wii | Simulator | - |
| ClaDun x2 (Oct 2, 2010 prototype) | 2 October 2010 10:50:39 | PlayStation Portable | Action role-playing game | - |
| Clash at Demonhead (Japanese prototype) | | NES | Platformer | - |
| Clash of the Titans (Dec 6, 2009 prototype) | 6 December 2009 | Xbox 360 | Action-adventure | - |
| Clay Fighter: Extreme (Apr 4, 1997 prototype) | 4 April 1997 17:12:50 | PlayStation | Fighting | ✓ |
| ClayFighter (Prototype) | | SNES | Fighting | - |
| 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 | - |
| Claymates (Prototype A) | | SNES | Platformer | - |
| Clive Barker's Jericho (Aug 31, 2007 prototype) | 31 August 2007 | Xbox 360 | | - |
| Clive Barker's Jericho (Jun 18, 2007 prototype) | 18 June 2007 | Xbox 360 | First-person shooter
survival horror | - |
| Clock Tower (Jul 18, 1997 prototype) | 18 July 1997 10:36:48 | PlayStation | Survival Horror | - |
| Clock Tower (Jul 5, 1997 prototype) | 5 July 1997 02:18:24 | PlayStation | Survival horror | - |
| Clock Tower (Prototype) | | SNES | Survival Horror | - |