| Title | Year | Genre |
|---|---|---|
| Objective Kursk | 1984 | Strategy |
| Ocean Night | ???? | Compilation |
| Odyssey, The Compleat Adventure) | 1980 | Adventure |
| Ogre | 1986 | Strategy |
| Oil Barons | ???? | Management |
| Oil-Rig | 1981 | Management |
| Oils Well | 1983 | Arcade |
| Old Ironsides | 1983 | Action |
| Oldorf | ???? | Adventure |
| Olympic Decathlon | 1981 | Sports |
| Omega | 1989 | Adventure |
| One On One | 1983 | Basketball |
| Oo-Topos | 1984 | Adventure |
| Operation Apocalypse | 1981 | Strategy |
| Operation Market Garden | 1985 | Strategy |
| Other Side, The | 1985 | Management |
| Over Run | ???? | Strategy |
| Overrun Europe | 1988 | Strategy |
