| SD Gundam Psycho Salamander no Kyoui | ? | 1991 |
Bandai | Commercial |
| Saurian Front | ? | 1991 |
Williams | Prototype |
| Sel Feena | ? | 1991 |
East Technology | Commercial |
| Sengoku Mahjong | JP | 1991 |
Sigma | Commercial |
| Skeet Shot | ? | 1991 |
Dynamo | Commercial |
| Slime Kun | ? | 1991 |
Konami | Commercial |
| Soccer Brawl | ? | 1991 |
SNK | Commercial |
| Solvalou | JP | 1991 |
Namco | Commercial |
| Sonic The Hedgehog | ? | 1991 |
Sega of Europe | Commercial |
| Space Ace | EU | 1991 |
Leland Corporation | Commercial |
| Spider-Man vs The Kingpin | ? | 1991 |
Sega | Commercial |
| Starblade | JP | 1991 |
Namco | Commercial |
| Starblade | WORLD | 1991 |
Namco | Commercial |
| Steel Gunner 2 | JP | 1991 |
Namco | Commercial |
| Steel Gunner 2 | US | 1991 |
Namco | Commercial |
| Stoneage | ? | 1991 |
| Unlicensed |
| Streets of Rage | ? | 1991 |
Sega Enterprises | Commercial |
| Strike Fighter | JP | 1991 |
Sega | Commercial |
| Strike Fighter | WORLD | 1991 |
Sega | Commercial |
| Strike Force | ? | 1991 |
Midway Manufacturing | Commercial |
| Strike Gunner S.T.G | ? | 1991 |
Tecmo | Commercial |
| Sunset Riders 2 | ? | 1991 |
| Unlicensed |
| Super High Impact | ? | 1991 |
Midway Manufacturing | Prototype |
| Super High Impact | ? | 1991 |
Midway Manufacturing | Commercial |
| Super Mario World | ? | 1991 |
Nintendo | Commercial |
| Super Pinball Action | JP | 1991 |
Tecmo | Commercial |
| Super Pinball Action | US | 1991 |
Tecmo | Commercial |
| Super Puzzle | ? | 1991 |
Sang Ho Soft | Commercial |
| Super Special Criminal Investigation | ? | 1991 |
hack (Negro Torino) | Unlicensed |
| Super Tennis | ? | 1991 |
Nintendo | Commercial |
| Super Volley '91 | JP | 1991 |
Video System | Commercial |
| Super Volleyball | ? | 1991 |
| Unlicensed |
| Supercharger 1942 | ? | 1991 |
hack (Two-Bit Score) | Commercial |
| Sengoku / Sengoku Denshou | ? | 1991-02 |
SNK | Commercial |
| Sengoku / Sengoku Denshou | US | 1991-02 |
SNK | Commercial |
| Solitary Fighter | WORLD | 1991-02 |
Taito Corporation Japan | Commercial |
| Street Fighter II: The World Warrior | JP | 1991-02 |
Capcom | Commercial |
| Street Fighter II: The World Warrior | US | 1991-02 |
Capcom | Commercial |
| Street Fighter II: The World Warrior | WORLD | 1991-02 |
Capcom | Commercial |
| Steel Talons | ? | 1991-08 |
Atari Games | Commercial |
| Steel Talons | ? | 1991-08 |
Atari Games | Prototype |
| Spider-Man: The Videogame | JP | 1991-09 |
Sega Enterprises | Commercial |
| Spider-Man: The Videogame | US | 1991-09 |
Sega Enterprises | Commercial |
| Spider-Man: The Videogame | WORLD | 1991-09 |
Sega Enterprises | Commercial |
| Sunset Riders | ? | 1991-09 |
Konami | Commercial |
| Sunset Riders | ? | 1991-09 |
Konami | Unlicensed |