| World Series Baseball '95 (Jan 16, 1995 prototype) | 17 January 1995 08:10:06 | Sega Mega Drive |
| World Series Baseball '95 (Jan 18, 1995 prototype RM) | | Sega Mega Drive |
| World Series Baseball '95 (Jan 20, 1995 prototype) | 20 January 1995 19:00:36 | Sega Mega Drive |
| World Series Baseball '95 (Jan 25, 1995 prototype) | 25 January 1995 19:22:10 | Sega Mega Drive |
| World Series Baseball '95 (Jan 3, 1995 prototype TST) | 4 January 1995 08:11:06 | Sega Mega Drive |
| World Series Baseball '95 (Jan 30, 1995 prototype) | 30 January 1995 17:18:28 | Sega Mega Drive |
| World Series Baseball '95 (Jan 5, 1995 prototype) | 5 January 1995 21:11:00 | Sega Mega Drive |
| World Series Baseball '95 (Jan 9, 1995 prototype TST) | 9 January 1995 14:57:50 | Sega Mega Drive |
| World Series Baseball '95 (Jul 19, 1994 prototype) | 19 July 1994 15:40:58 | Game Gear |
| World Series Baseball '95 (Jul 22, 1994 prototype) | 22 July 1994 14:24:18 | Game Gear |
| World Series Baseball '95 (Jul 28, 1994 prototype) | 28 July 1994 17:02:50 | Game Gear |
| World Series Baseball '95 (Jul 29, 1994 prototype) | 29 July 1994 15:57:14 | Game Gear |
| World Series Baseball '95 (Jul 9, 1994 prototype) | 9 July 1994 15:23:48 | Game Gear |
| World Series Baseball '95 (Jun 29, 1994 prototype) | 29 June 1994 12:49:16 | Game Gear |
| World Series Baseball (Dec 22, 1993 prototype) | | Sega Mega Drive |
| World Series Baseball (Dec 26, 1993 prototype) | 26 December 1993 11:35:02 | Sega Mega Drive |
| World Series Baseball (Dec 29, 1993 prototype) | 29 December 1993 18:16:06 | Sega Mega Drive |
| World Series Baseball (Feb 18, 1994 prototype) | 18 February 1994 14:51:14 | Sega Mega Drive |
| World Series Baseball (Jan 16, 1994 prototype) | 17 January 1994 02:11:46 | Sega Mega Drive |
| World Series Baseball (Jan 3, 1994 prototype) | 4 January 1994 07:13:58 | Sega Mega Drive |
| World Series Baseball (Jan 6, 1994 prototype) | 6 January 1994 09:59:00 | Sega Mega Drive |
| World Series Baseball (Mar 4, 1994 prototype) | | Sega Mega Drive |
| World Series Baseball (May 27, 1994 prototype) | 28 June 1994 08:59:52 | Sega Mega Drive |
| World Series Baseball (Oct 1, 1993 prototype) | | Sega Mega Drive |
| World of Illusion starring Mickey Mouse & Donald Duck (Prototype B) | | Sega Mega Drive |
| X (Alpha) | | SNES |
| X-Men - Gamemaster's Legacy (Aug 10, 1994 prototype) | 10 August 1994 08:58:08 | Game Gear |
| X-Men - Gamemaster's Legacy (Aug 31, 1994 prototype) | 31 August 1994 04:43:52 | Game Gear |
| X-Men - Gamemaster's Legacy (Sep 6, 1994 prototype C) | 6 September 1994 17:45:54 | Game Gear |
| X-Men - Gamemaster's Legacy (Sep 6, 1994 prototype) | 6 September 1994 16:05:26 | Game Gear |
| X-Men - Mojo World (Jul 5, 1996 prototype) | 5 July 1996 12:25:28 | Game Gear |
| X-Men - Mojo World (Jun 13, 1996 prototype) | 13 June 1996 12:55:28 | Game Gear |
| X-Men - Mojo World (Jun 24, 1996 prototype) | 24 June 1996 15:36:18 | Game Gear |
| X-Men - Mojo World (Jun 25, 1996 prototype) | 25 June 1996 11:04:22 | Game Gear |
| X-Men - Mojo World (Jun 27, 1996 prototype) | 27 June 1996 18:52:56 | Game Gear |
| X-Men - Mojo World (Jun 28, 1996 prototype) | 28 June 1996 10:20:14 | Game Gear |
| X-Men - Mojo World (Jun 29, 1996 prototype) | 29 June 1996 12:59:40 | Game Gear |
| X-Men - Mojo World (Jun 5, 1996 prototype) | 5 June 1996 15:51:00 | Game Gear |
| X-Men 2 - Clone Wars (Dec 10, 1994 prototype) | 10 December 1994 04:24:32 | Sega Mega Drive |
| X-Men 2 - Clone Wars (Dec 11, 1994 prototype A) | 11 December 1994 19:25:06 | Sega Mega Drive |
| X-Men 2 - Clone Wars (Dec 11, 1994 prototype) | 11 December 1994 10:01:02 | Sega Mega Drive |
| X-Men 2 - Clone Wars (Dec 14, 1994 prototype) | 14 December 1994 14:23:42 | Sega Mega Drive |
| X-Men 2 - Clone Wars (Dec 15, 1994 prototype) | 15 December 1994 18:59:32 | Sega Mega Drive |
| X-Men 2 - Clone Wars (Dec 16, 1994 prototype) | 16 December 1994 17:31:16 | Sega Mega Drive |
| X-Men 2 - Clone Wars (Dec 17, 1994 prototype) | 17 December 1994 14:39:52 | Sega Mega Drive |
| X-Men 2 - Clone Wars (Dec 2, 1994 prototype) | 2 December 1994 20:57:50 | Sega Mega Drive |
| X-Men 2 - Clone Wars (Dec 3, 1994 prototype) | 3 December 1994 23:21:14 | Sega Mega Drive |
| X-Men 2 - Clone Wars (Dec 6, 1994 prototype) | 6 December 1994 06:32:54 | Sega Mega Drive |
| X-Men 2 - Clone Wars (Dec 7, 1994 prototype) | 7 December 1994 08:06:20 | Sega Mega Drive |
| X-Men 2 - Clone Wars (Dec 8, 1994 prototype) | 8 December 1994 16:46:06 | Sega Mega Drive |