ZX Spectrum (TAP) ROMs

On The Run (1988)(MCM Software)[re-release]

One Man And His Droid II (2001)(Clive Brooker)[128K]

One On One (1985)(Serma Software)[re-release]

Oops (1988)(The Big Apple Entertainment Company)

Open Door (1988)(Tartan Software)

Operacion Conquista (1992)(Pepsi Soft)(es)

Operation Berlin (1987)(Wrightchoice Software)(Side B)

Operation Gunship (1989)(Codemasters)[128K]

Operation Hanoi (1990)(Players Premier Software)[128K]

Operation Hormuz (1989)(Again Again)

Operation Nightingale (1985)(Softly Softly)

Operation Thunderbolt (1989)(Erbe Software)(Side B)[48-128K][re-release]

Operation Thunderbolt (1989)(Ocean)(Side A)[48-128K]

Operation Thunderbolt (1989)(Ocean)(Side A)[a2][48-128K]

Operation Thunderbolt (1989)(Ocean)(Side B)[48-128K]

Operation Thunderbolt (1989)(The Hit Squad)(Side A)[48-128K][re-release]

Operation Thunderbolt (1989)(The Hit Squad)(Side B)[48-128K][re-release]

Operation Turtle (1984)(Pocket Money Software)

Operation Wolf (1988)(Erbe Software)[128K][re-release]

Operation Wolf (1988)(The Hit Squad)[re-release]

Oracle's Cave, The (1984)(Doric Computer Services)

Oracle's Cave, The (1984)(Doric Computer Services)[a]

Oracle's Cave, The (1984)(Doric Computer Services)[a2]

Orbit Of Doom (1985)(Central Solutions)

Orbiter (1982)(Silversoft)

Orbix The Terrorball (1986)(Streetwise)

Orbix The Terrorball (1987)(Z Cobra)[a][re-release]

Orbix The Terrorball (1987)(Z Cobra)[re-release]

Orc Island (1984)(Double Play Adventures)[a]

Orc Slayer (1984)(Gamma Software)[a]

Oriental Hero (1987)(Firebird Software)

Orion (1983)(Software Projects)

Oso Bobo, El (1983)(Investronica)(es)[aka Bear Bovver]

Othello (19xx)(ERE Informatique)(fr)[16K]

Othelo (1984)(J.A.R.)(es)

Out For The Count (1989)(Dynamite Designs)[a]