| Titre | Année | Genre |
|---|---|---|
| Oceans Below | 1995 | Educatif |
| Off-World Interceptor | 1994 | Action |
| Ogura Hyakunin Isshu | 1995 | Aventures |
| Olympic Soccer - Atlanta 1996 | 1996 | Football |
| Olympic Summer Games - Atlanta 1996 | 1996 | Sports |
| Oneesan to Issho! Janken Paradise | 1994 | Aventures |
| Oneesan to Issho! Kisekae Paradise | 1995 | Aventures |
| OnSide Soccer | 2007 | Football |
| Oukoku no Grand Chef | 1996 | RPG |
| Out of This World | 1994 | Aventures |
| Outer World | 1994 | Aventures |
| Oyaji Hunter Mahjong | 1995 | Mahjong |
