| Title | Year | Genre |
|---|---|---|
| Orbit | 1994 | Arcade |
| Orbit 2000 | 1991 | Shooter |
| Oriental Games | ???? | Adventure |
| Ork | ???? | Platform |
| Ork Attack The Return | ???? | Arcade |
| Ortho-CM | ???? | Educational |
| Orthogus Tome 1 | ???? | Educational |
| Ortotris | 1994 | Puzzle |
| Oscar | ???? | Platform |
| Osiris | ???? | Puzzle |
| Oswald | ???? | Arcade |
| OsWALD of the Ice Floes | ???? | Arcade |
| Othello Killer | 1989 | Puzzle |
| Otik Gold Edice | ???? | Adventure |
| Out of this World | ???? | Adventure |
| Out Run | 1989 | Racing |
| Out Run Europa | ???? | Moto racing |
| Out to Lunch | ???? | Platform |
| Outerim | ???? | Management |
| Outfall | 1995 | Puzzle |
| Outlands | ???? | Shooter |
| Outliner | 1996 | Shooter |
| Outpost - Solo Assault | 1991 | Spaceship |
| Outzone | ???? | Shooter |
| Over the Net | ???? | Volleyball |
| Overdose | 1996 | Puzzle |
| Overdrive | ???? | Action |
| Overkill | ???? | Shooter |
| Overlander | ???? | Racing |
| Overlord | ???? | Adventure |
| Overrun! - A Tactical Game of Modern Land Warfare | ???? | Strategy |
| OverTaking | 1994 | Arcade |
| Oxxonian | ???? | Arcade |
| Oxyd | ???? | Puzzle |
| Oxyd Magnum! | 1993 | Arcade |
| P-GWIN | ???? | Arcade |
| P.L.E.B.S. | ???? | Arcade |
| P47 Thunderbolt | ???? | Shooter |
| Pac-Land | ???? | Platform |
| Pac-Mania | ???? | Arcade |
| Pacboy & Shooting Star | ???? | Arcade |
| Paccer | 1989 | Arcade |
| Paccy | ???? | Arcade |
| Pacific Islands | ???? | Strategy |
| Pacman '96 | 1996 | Arcade |
| Pacman 3D | 1994 | Arcade |
| Pacman 500 | 2022 | Arcade |
| Pacman 87 | ???? | Arcade |
| Paint and Create | ???? | Educational |
| Paint It | 1994 | Arcade |
