| Combat II (Prototype) | | Atari 2600 | Flight Simulator | ✓ |
| Combat Wings: The Great Battles of WWII (May 14, 2012 prototype) | 14 May 2012 | Xbox 360 | Flight Combat | - |
| Comic Jumper: The Adventures of Captain Smiley (Jun 10, 2010 prototype) | 10 June 2010 | Xbox 360 | Action | - |
| 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 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 (Mar 27, 2009 prototype) | 27 March 2009 | Xbox 360 | Action-Brawler | - |
| 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 | - |
| Comix Zone (May 31, 1995 prototype) | 31 May 1995 15:49:04 | Sega Mega Drive | Beatem Up | - |
| Command & Conquer Red Alert 3: Commander's Challenge (Jul 30, 2009 prototype) | 30 July 2009 | Xbox 360 | Real-Time Strategy | - |
| Command & Conquer: Red Alert (Oct 11, 1996 prototype) | 11 October 1996 | PC | RTS | - |
| Command & Conquer: Red Alert 3 (Oct 12, 2008 prototype) | 12 October 2008 03:56:32 | Xbox 360 | Action | - |
| Command & Conquer: Red Alert 3 (Oct 8, 2008 prototype) | 8 October 2008 | Xbox 360 | RTS | - |
| Command and Conquer: Commando (Jul 14, 1997 prototype) | 14 July 1997 12:06:20 | PlayStation | Adventure | ✓ |
| Commanders: Attack (Nov 26, 2007 prototype) | 26 November 2007 | Xbox 360 | Turn Based | - |
| Commando (Apr 29, 1988 prototype) | 29 April 1988 | Atari 7800 | Shooter | - |
| Commandos 2 (Nov 28, 2002 prototype) | 28 November 2002 | Game Boy Advance | Action | ✓ |
| Commandos 2: Men of Courage (Aug 12, 2002 prototype) | 12 August 2002 13:06:55 | Xbox | Real-Time Strategy | - |
| Commandos: Strike Force (Feb 28, 2005 prototype) | 28 February 2005 19:11:24 | PlayStation 2 | FPS | - |
| Community Games Player Pack (May 27, 2009 prototype) | 27 May 2009 | Xbox 360 | Compilation | - |
| Complete Onside Soccer (Feb 27, 1996 prototype) | 27 February 1996 18:29:38 | PlayStation | Sports - Soccer | - |
| Compton's Interactive Encyclopedia (Oct 27, 1992 prototype) | 27 October 1992 03:25:22 | Philips CD-i | Reference | - |
| Computer BattleTech (Jan 22, 1998 prototype) | 22 January 1998 | PC | Strategy | ✓ |
| Conan (Aug 28, 2007 prototype) | 28 August 2007 | Xbox 360 | Action | - |
| Conan (Sep 17, 2007 prototype) | 17 September 2007 23:42:30 | Xbox 360 | Action | - |
| Condemned 2: Bloodshot (Dec 12, 2007 prototype) | 12 December 2007 | Xbox 360 | Survival Horror | - |
| Condemned 2: Bloodshot (Dec 8, 2007 prototype) | 8 December 2007 00:00:00 | Xbox 360 | Action Adventure | - |
| Condemned 2: Bloodshot (Feb 17, 2008 prototype) | 17 February 2008 | Xbox 360 | Action Adventure | - |
| Condemned 2: Bloodshot (Feb 3, 2008 prototype) | 3 February 2008 | Xbox 360 | Survival horror | - |
| Condemned: Criminal Origins (Aug 11, 2005 prototype) | 11 August 2005 | Xbox 360 | Shooter | - |
| 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 Zone: Modern War Strategy (Apr 22, 2000 prototype) | 22 April 2000 10:17:30 | PlayStation 2 | Real-time Strategy | - |
| Conflict Zone: Modern War Strategy (Aug 8, 2000 prototype) | 8 August 2000 12:38:06 | PlayStation 2 | Real-time Strategy | - |
| Conflict: Denied Ops (Nov 15, 2007 prototype) | 15 November 2007 12:53:13 | PlayStation 3 | Tactical Shooter | - |
| Conflict: Global Terror (Aug 9, 2005 prototype) | 9 August 2005 09:18:41 | PlayStation 2 | Tactical shooter | - |
| Conflict: Vietnam (Jul 27, 2004 prototype) | 27 July 2004 12:19:18 | PlayStation 2 | Third-person shooter | - |
| Conflict: Vietnam (Prototype) | | Gizmondo | Tactical shooter | ✓ |