| Title | Platform | Year | Company | Composer |
| Operation GII | AMI | ? | Psygnosis | Mike Clarke |
| Order of the Griffon | TG16 | 1992 | Westwood Associates | Frank Klepacki |
| Out to Lunch | AMI, CD32, SNES | 1994 | Mindscape | Mark Knight |
| Outlander | GEN | 1992 | Mindscape | Ben Watkins, Jason Page |
| Outlander | SNES | 1993 | Mindscape | Ben Watkins, Mark Knight |
| Outlaws | PC | 1997 | LucasArts Entertainment | Clint Bajakian, Hans Christian Reumschuessel |
| Overkill & Lunar-C | CD32 | 1993 | Mindscape | Mark Knight |