| Title | Year | Genre |
|---|---|---|
| Olympic Gold - Barcelona '92 | 1992 | Sports |
| Olympic Gold | 1992 | Sports |
| Olympic Summer Games - Atlanta 1996 | 1996 | Sports |
| Olympic Summer Games | 1996 | Sports |
| Ondal Janggun | 1990 | Action |
| Onslaught | 1991 | Strategy |
| Ooze, The | 1996 | Action |
| Operation Europe | 1994 | Strategy |
| Osomatsu-kun - Hachamecha Gekijou | 1988 | Action |
| Ottifants, The | 1995 | Platform |
| Out of This World | 1992 | Adventure |
| Outback Joey with Heartbeat Personal Trainer | 1993 | Sports |
| Outlander | 1992 | Racing |
| OutRun | 1991 | Racing |
| OutRun 2019 | 1993 | Racing |
| OutRunners | 1994 | Racing |
| Ozaki Naomichi no Super Masters | 1989 | Golf |
