| Darius Burst: Chronicle Saviours (Nov 9, 2015 prototype) | 9 November 2015 | PlayStation Vita | Shoot 'Em Up | - |
| Dark Arms: Beast Busters (Prototype) | | Neo Geo Pocket Color | Role Playing | - |
| Dark Chambers (Nov 22, 1985 prototype) | | Atari 2600 | | - |
| Dark Cloud (July 12, 2001 prototype) | 12 July 2001 10:19:58 | PlayStation 2 | | - |
| Dark Cloud 2 (Dec 26, 2002 08.12 prototype) | 26 December 2002 08:12:56 | PlayStation 2 | RPG | - |
| Dark Eden (Prototype) | | Game Boy Advance | Action | ✓ |
| Dark Empire (Prototype) | | Game Boy Advance | Role playing | ✓ |
| Dark Fathoms (May 07, 2009 Tech Demo) | 7 May 2009 20:35:33 | Xbox 360 | | ✓ |
| Dark Guardian - Episode 1: Unknown Enemy (prototype) | 2001 | Atari Jaguar | | ✓ |
| Dark Kingdom (v0.55 prototype) | | SNES | Role playing | - |
| Dark Messiah of Might and Magic: Elements (Dec 21, 2007 prototype) | 21 December 2007 02:20:46 | Xbox 360 | Action | - |
| Dark Messiah of Might and Magic: Elements (Oct 18, 2007 prototype) | 18 October 2007 00:00:00 | Xbox 360 | First Person Shooter | - |
| Dark Reign 2 (Apr 13, 2000 Prototype) | 13 April 2000 | PC | | - |
| Dark Reign 2 (Apr 25, 2000 QA Prototype) | 25 April 2000 | PC | | - |
| Dark Reign 2 (Apr 4, 2000 QA Alpha prototype) | 4 April 2000 | PC | | - |
| Dark Reign 2 (May 14, 2000 QA "WON Beta" prototype) | 25 April 2000 | PC | | - |
| Dark Reign: Rise of the Shadowhand (Feb 18, 1998 prototype) | 18 February 1998 | PC | | - |
| Dark Rift (May 14, 1996 prototype) | 14 May 1996 21:26:18 | PlayStation | Fighting | ✓ |
| Dark Savior (Nov 2, 1996 prototype) | 2 November 1996 19:45:48 | Sega Saturn | Action | - |
| Dark Souls (Aug 21, 2011 prototype) | 21 August 2011 | Xbox 360 | Action Role-playing | - |
| Dark Souls II (Network Test EU) | | PlayStation 3 | Action role-playing | - |
| Dark Souls II (Network Test JP) | | PlayStation 3 | Action role-playing | - |
| Dark Souls II (Network Test US) | | PlayStation 3 | Action role-playing | - |
| Dark Summit (Jul 6, 2001 E3 prototype) | 6 July 2001 04:24:46 | Xbox | Sports - Snowboarding | - |
| Dark Void (Nov 4, 2009 prototype) | 27 October 2009 | Xbox 360 | Third-person shooter, action-adventure | - |
| Darksiders (May 29, 2009 prototype) | 29 May 2009 | Xbox 360 | Action-adventure | - |
| Darksiders II (Sep 20, 2011 prototype) | 20 September 2011 19:13:19 | Xbox 360 | Action Adventure | - |
| Darkstalkers 3 (May 25, 1998 prototype) | 25 May 1998 06:31:12 | PlayStation | Fighting | - |
| Darkstalkers Ressurection (Jan 21, 2013 prototype) | 21 January 2013 | Xbox 360 | Fighting | - |
| Darkwatch (Jun 1, 2005 prototype) | 1 June 2005 21:34:52 | Xbox | First-Person Shooter | - |
| Darkwing Duck (Game Boy prototype) | | Game Boy | Platformer | - |
| Darkwing Duck (NES prototype) | | NES | Platformer | - |
| Darwin 4081 (Feb 21, 1990 prototype) | 21 February 1990 16:52:40 | Sega Mega Drive | Shooter | - |
| Darwinia+ (Dec 10, 2009 prototype) | 10 December 2009 | Xbox 360 | Real-Time Strategy | - |
| Darwinia+ (May 13, 2009 prototype) | 13 May 2009 | Xbox 360 | Real Time Strategy | - |
| Dash of Destruction (Oct 27, 2008 prototype) | 27 October 2008 | Xbox 360 | Arcade | - |
| Dashin' Desperadoes (PAL prototype) | | Sega Mega Drive | Platform | - |
| Dave Mirra BMX Challenge (Oct 17, 2006 prototype) | 17 October 2006 16:13:35 | Xbox 360 | Sports - Biking | ✓ |
| Dave Mirra Freestyle BMX (Aug 17, 2000 prototype) | 17 August 2000 19:27:18 | PlayStation | Sports - BMX | - |
| Dave Mirra Freestyle BMX (Jul 25, 2000 prototype) | 25 July 2000 18:37:36 | PlayStation | | - |
| Dave Mirra Freestyle BMX (Nov 2, 2000 prototype) | 2 November 2000 11:55:22 | Dreamcast | Sports - Biking | - |
| 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 28, 2000 prototype) | 28 September 2000 | Dreamcast | Sports | - |
| Dave Mirra Freestyle BMX (Sep 7, 2000 prototype) | 7 September 2000 | Dreamcast | Sports | - |
| Dave Mirra Freestyle BMX 2 (Aug 13, 2001 prototype) | 13 August 2001 20:16:08 | PlayStation 2 | Sports - Biking | - |
| Dave Mirra Freestyle BMX 2 (Jul 8, 2001 prototype) | 8 July 2001 15:42:54 | PlayStation 2 | Sports - Biking | - |
| Dave Mirra Freestyle BMX 2 (Oct 14, 2001 prototype) | 14 October 2001 02:40:27 | Xbox | Sports | - |
| Dave Mirra Freestyle BMX 2 (Sep 19, 2001 prototype) | 19 September 2001 20:30:43 | Xbox | Sports | - |
| Dave Mirra Freestyle BMX 4 (Nov 8, 2002 prototype) | 8 November 2002 12:02:26 | Xbox | Sports - Biking | ✓ |