| WWF Wrestlemania - Steel Cage Challenge | BR | 1993-07 |
Flying Edge | Commercial |
| WWF Wrestlemania - Steel Cage Challenge | EU | 1993-07 |
Flying Edge | Commercial |
| Wah Munchers | WORLD | |
| Prototype |
| Waimanu - Scary Monsters Saga | WORLD | |
| Unlicensed |
| Walter Payton Football | US | 1990 |
Sega of America | Commercial |
| Wanted | BR | 1989-08 |
Sega of America | Commercial |
| Wanted | EU | 1989-11 |
Sega of America | Commercial |
| Wanted | US | 1989-08 |
Sega of America | Commercial |
| Waternet | WORLD | |
| Unlicensed |
| Weka Invaders | WORLD | |
| Unlicensed |
| Whack 'Em Smack 'Em Byrons Remarked | WORLD | |
| Unlicensed |
| Where Is It | WORLD | 2023-09 |
SMS Power! | Unlicensed |
| Where in the World is Carmen Sandiego | BR | 1989 |
Parker Brothers | Commercial |
| Where in the World is Carmen Sandiego | US | 1989 |
Parker Brothers | Commercial |
| Wimbledon | BR | 1992-05 |
Sega Enterprises | Commercial |
| Wimbledon | EU | 1992-05 |
Sega Enterprises | Commercial |
| Wimbledon II | BR | 1993 |
Sega Enterprises | Commercial |
| Wimbledon II | EU | 1993 |
Sega Enterprises | Commercial |
| Wing Warriors | WORLD | 2024 |
EGS | Unlicensed |
| Wing Warriors | WORLD | 2024 |
EGS | Prototype |
| Winter Olympics | BR | 1993 |
U.S. Gold | Commercial |
| Winter Olympics | EU | 1993 |
U.S. Gold | Commercial |
| Winter Shooter | WORLD | |
| Prototype |
| Wolfchild | BR | 1993-09 |
Virgin | Commercial |
| Wolfchild | EU | 1993-09 |
Virgin | Commercial |
| Wolfenstein | WORLD | |
| Unlicensed |
| Wonder Boy | BR | 1987-03 |
Sega of America | Commercial |
| Wonder Boy | EU | 1987-03 |
Sega of America | Commercial |
| Wonder Boy | JP | 1987-03-22 |
Sega of America | Commercial |
| Wonder Boy | US | 1987-06 |
Sega of America | Commercial |
| Wonder Boy III - The Dragon's Trap | EU | 1989-09 |
Sega | Commercial |
| Wonder Boy III - The Dragon's Trap | US | 1989-09 |
Sega | Commercial |
| Wonder Boy III - The Dragon's Trap | WORLD | 1989-09 |
Sega | Commercial |
| Wonder Boy in Monster Land | EU | 1988-01 |
Sega of America | Commercial |
| Wonder Boy in Monster Land | EU | 1988-01 |
Sega of America | Prototype |
| Wonder Boy in Monster Land | US | 1988-08 |
Sega of America | Commercial |
| Wonder Boy in Monster Land | US | 1988-08 |
Sega of America | Prototype |
| Wonder Boy in Monster World | EU | 1993-08 |
Sega Enterprises | Commercial |
| Wonder Boy in Monster World | EU | 1993-08 |
Sega Enterprises | Prototype |
| Wonder Kid | KR | |
| Unlicensed |
| Wonsiin | KR | 1991 |
Zemina | Unlicensed |
| Woody Pop - Shinjinrui no Block Kuzushi | JP | 1987-03-15 |
Sega Enterprises | Commercial |
| World Class Leaderboard | BR | 1991 |
U.S. Gold | Commercial |
| World Class Leaderboard | EU | 1991 |
U.S. Gold | Commercial |
| World Cup Italia '90 | BR | 1990-12 |
Sega Enterprises | Commercial |
| World Cup Italia '90 | EU | 1990-12 |
Sega Enterprises | Commercial |
| World Cup USA 94 | BR | 1992 |
U.S. Gold | Commercial |
| World Cup USA 94 | EU | 1994-06-03 |
U.S. Gold | Commercial |
| World Games | BR | 1989 |
Sega Enterprises | Commercial |
| World Games | BR | 1989 |
Sega Enterprises | Prototype |
| World Games | EU | 1990 |
Sega Enterprises | Commercial |
| World Games | EU | 1990 |
Sega Enterprises | Prototype |
| World Grand Prix | BR | 1986-10 |
Sega of America | Commercial |
| World Grand Prix | BR | 1986-09 |
Sega of America | Prototype |
| World Grand Prix | EU | 1987-11 |
Sega of America | Commercial |
| World Grand Prix | US | 1986-10 |
Sega of America | Commercial |
| World Grand Prix | US | 1986-10 |
Sega of America | Prototype |
| World Soccer | BR | 1987-07 |
Sega Enterprises | Unlicensed |
| World Soccer | WORLD | 1987-07-19 |
Sega Enterprises | Commercial |