| Title | Year | Publisher |
|---|---|---|
| Oh Mummy | 1984 | Amsoft |
| Oh Mummy | 1984 | Amsoft |
| Olli & Lissa - The Ghost Of Shilmore Castle | 1987 | Firebird |
| One Man And His Droid | 1985 | Mastertronic |
| Operation Gunship | 198? | Codemasters |
| Operation Hanoi | 1990 | Players Premier |
| Operation Hormuz | 1987 | Alternative Software Ltd |
| Outrun (Audio Sound Track) | U.S. Gold |