| Woody Pop | JP | 1991-03-01 |
Sega of America | Commercial |
| Woody Pop | US | 1991-03 |
Sega of America | Commercial |
| World Class Leaderboard | EU | 1991 |
U.S. Gold | Commercial |
| World Class Leaderboard | US | 1991 |
U.S. Gold | Commercial |
| World Cup USA 94 | BR | 1994 |
U.S. Gold | Commercial |
| World Cup USA 94 | EU | 1994 |
U.S. Gold | Commercial |
| World Cup USA 94 | US | 1994 |
U.S. Gold | Commercial |
| World Derby | JP | 1994-05-27 |
CSK Research Institute | Commercial |
| World Series Baseball | US | 1993-11 |
Sega of America | Commercial |
| World Series Baseball '95 | US | 1994-10 |
Sega of America | Commercial |
| World Series Baseball '95 | US | 1994-10 |
Sega of America | Prototype |
| X-Men | US | 1994-01 |
Sega of America | Commercial |
| X-Men - GameMaster's Legacy | EU | 1994-02 |
Sega of America | Prototype |
| X-Men - GameMaster's Legacy | US | 1994-02 |
Sega of America | Prototype |
| X-Men - Gamemaster's Legacy | EU | 1994-02 |
Sega of America | Commercial |
| X-Men - Gamemaster's Legacy | US | 1994-02 |
Sega of America | Commercial |
| X-Men - Mojo World | US | 1996 |
Sega of America | Commercial |
| X-Men - Mojo World | US | 1996 |
Sega of America | Prototype |
| Yakitori Meijin Torigin | JP | |
| Unlicensed |
| Yewdow Mini | WORLD | |
| Unlicensed |
| Yogi Bear in Yogi Bear's Goldrush | EU | 1994 |
GameTek | Prototype |
| Yu Yu Hakusho - Horobishimono no Gyakushuu | JP | 1994-03 |
Sega Enterprises | Commercial |
| Yu Yu Hakusho II - Gekitou! Nanakyou no Tatakai | JP | 1994-09-30 |
Sega Enterprises | Commercial |
| Yum! | WORLD | |
| Prototype |
| Zan Gear | JP | 1990-10-23 |
Wolf Team | Commercial |
| Zool - Ninja of the 'Nth' Dimension | EU | 1994-03 |
Gremlin Graphics Software | Commercial |
| Zool - Ninja of the 'Nth' Dimension | US | 1993 |
Gremlin Graphics Software | Commercial |
| Zool no Yume Bouken | JP | 1994-07 |
Gremlin Graphics Software | Commercial |
| Zoop | US | 1995 |
Viacom New Media | Commercial |
| Zoop | US | 1995 |
Viacom New Media | Prototype |
| Zoop'em Up | WORLD | 2002-03 |
SMS Power! | Unlicensed |