| Alpha Mission II / ASO II - Last Guardian | ? | 1991 |
SNK | Prototype |
| Sengoku / Sengoku Denshou | US | 1991 |
SNK | Commercial |
| Soccer Brawl | ? | 1991 |
SNK | Commercial |
| Ghost Pilots | ? | 1991-01 |
SNK | Prototype |
| Ghost Pilots | US | 1991-01 |
SNK | Commercial |
| Ghost Pilots | ? | 1991-01-25 |
SNK | Commercial |
| Sengoku / Sengoku Denshou | ? | 1991-02-12 |
SNK | Commercial |
| King of the Monsters | ? | 1991-02-25 |
SNK | Commercial |
| Alpha Mission II / ASO II - Last Guardian | ? | 1991-03-25 |
SNK | Commercial |
| Burning Fight | ? | 1991-05 |
SNK | Prototype |
| Burning Fight | US | 1991-05 |
SNK | Commercial |
| Burning Fight | ? | 1991-05-20 |
SNK | Commercial |
| Eight Man | ? | 1991-06 |
SNK | Commercial |
| Legend of Success Joe / Ashita no Joe Densetsu | ? | 1991-07 |
SNK | Commercial |
| Quiz Daisousa Sen - The Last Count Down | ? | 1991-07 |
SNK | Commercial |
| Crossed Swords | ? | 1991-07-25 |
Alpha Denshi Co | Commercial |
| 2020 Super Baseball | ? | 1991-09-20 |
SNK | Commercial |
| Robo Army | ? | 1991-10-30 |
SNK | Commercial |
| Bakatonosama Mahjong Manyuuki | ? | 1991-11 |
Monolith Productions | Commercial |
| Thrash Rally | ? | 1991-11-08 |
Alpha Denshi Co | Commercial |
| Fatal Fury - King of Fighters / Garou Densetsu - Shukumei no Tatakai | ? | 1991-11-25 |
SNK | Commercial |