Obliterator ![[Media: Disc]](disc.gif) | 1989 | Melbourne House |
Ocp Advanced Art Studio ![[Media: Disc]](disc.gif) | 1985 | Rainbird |
Official Father Christmas (The) ![[Media: Cassette]](cass.gif) | 1989 | Alternative Software Ltd. |
Oh Mummy ![[Media: Cassette]](cass.gif) | 1984 | Amsoft |
Oh Mummy ![[Media: Cassette]](cass.gif) | 1984 | Amsoft |
Ole Toro ![[Media: Cassette]](cass.gif) | 1985 | Dinamic Software |
Olli & Lissa - The Ghost Of Shilmore Castle ![[Media: Cassette]](cass.gif) | 1987 | Firebird |
Olli & Lissa 3 - Candlelight Adventure ![[Media: Cassette]](cass.gif) | 1989 | Codemasters |
One Man And His Droid ![[Media: Cassette]](cass.gif) | 1985 | Mastertronic |
Operation Gunship ![[Media: Cassette]](cass.gif) | 198? | Codemasters |
Operation Gunship ![[Media: Cassette]](cass.gif) | 1989 | Codemasters |
Operation Hanoi ![[Media: Cassette]](cass.gif) | 1990 | Players Premier |
Operation Hormuz ![[Media: Cassette]](cass.gif) | 1987 | Alternative Software Ltd |
Operation Thunderbolt | 1990 | Ocean |
Outrun (Audio Sound Track) | | U.S. Gold |
Overlander ![[Media: Cassette]](cass.gif) | 1988 | M.C.M. Software |