Commodore 64 ROMs
Letter: O
- O'Riley's Mine
- O'Riley's Mine (1983)(Datasoft Inc.)[a]
- OCP Art Studio, The Side 1
- OCP Art Studio, The Side 2
- Octoplex
- Odysseus - Trojan Warrior
- Odysseus - Trojan Warrior (1988)(Silverbird)
- Odyssey
- Oh No!
- Oh No! (1988)(Sensible Software)[a][l Cyberload]
- olle_and_lissa
- Olli & Lissa - The Ghost Of Shilmoore Castle
- Olli & Lissa - The Ghost of Shilmoore Castle (1987)(Firebir2
- Olli & Lissa - The Ghost of Shilmoore Castle (1987)(Firebir3
- Olli & Lissa - The Ghost of Shilmoore Castle (1987)(Firebir4
- Olli & Lissa - The Ghost of Shilmoore Castle (1987)(Firebird
- Olli & Lissa 3 - The Candlelight Adventure (1990)(Code Maste
- Olli And Lissa 3
- Ollie's Follies
- OLLO (1986)(Bug-Byte Software LTD)
- Ollo I
- Ollo II
- OLLO II (19xx)(Craza Soft)
- Olympic Skier (Americana)
- Omega Run, The
- On Court Tennis
- On Court Tennis (1984)(Activision Home Computer Software)[a]
- On Cue (1987)(Mastertronic LTD)[l Visiload T2]
- On Cue (1987)(Mastertronic LTD)[o][l Visiload T2]
- On Cue (Pool)
- On Cue (Snooker)
- On Field Football (1984)(Activision Inc.)[a][l Firebird T1]
- On The Bench
- On the Bench (1990)(Cult Games)
- On The Tiles
- On the Tiles (1987)(Odin Computer Graphics)
- On the Tiles (1987)(Odin Computer Graphics)[a]
- One Man And His Droid
- One Man and his Droid (1985)(Mastertronic LTD)[a][l Visiload
- One Man and his Droid (1985)(Mastertronic LTD)[u][l Visiload
- One On One
- One on One - Julius Erving and Larry Bird (1984)(Electronic
- One on One - Julius Erving and Larry Bird (1984)(Electronic2
- OnFieldFootball
- Oolis
- Operation Fireball
- Operation Fireball (1987)(Alternative Software)[a][l CHR]
- Operation Hanoi
- Operation Hormuz
- Operation Thunderbolt (1990)(Ocean Software LTD)(Side A)[a][
- Operation Thunderbolt (1990)(Ocean Software LTD)(Side A)[u][
- Operation Thunderbolt (1990)(Ocean Software LTD)(Side B)[a][
- Operation Thunderbolt (1990)(Ocean Software LTD)(Side B)[u][
- Operation Thunderbolt Side 1
- Operation Thunderbolt Side 2
- Operation Whirlwind
- Operation Wolf
- Operation Wolf (1988)(Ocean Software LTD)[a][l Freeload]
- Operation Wolf (1988)(Ocean Software LTD)[u][l Freeload]
- Orbitron
- Orc Attack
- Orc Attack (1984)(Creative Sparks)
- Orion
- Orpheus in the Underworld (1984)(Sterling Software)
- Otan Alerta - Teatro de Europa (19xx)(Personal Software Serv
- Othello (1984)(Microelectronica y Control)(Sp)
- Othello (1984)(Microelectronica y Control)(Sp)[a]
- Othello (1987)(Wicked Software)
- Out of this World (1988)(Reaktor Software-Ariolasoft)
- Out of this World (1988)(Reaktor Software-Ariolasoft)[a]
- Out on a Limb (1985)(Anirog Software)
- Out Run (1988)(US Gold LTD)(Side A)[l 720-US Gold Tape][db A
- Out Run (1988)(US Gold LTD)(Side B)[l 720-US Gold Tape][db C
- Out Run (1988)(US Gold LTD)(Tape 1 of 2 Side A)[a][l 720-US
- Out Run (1988)(US Gold LTD)(Tape 1 of 2 Side A)[a][l 720-US2
- Out Run (1988)(US Gold LTD)(Tape 1 of 2 Side A)[b][l 720-US
- Out Run (1988)(US Gold LTD)(Tape 1 of 2 Side A)[b][l 720-US2
- Out Run (1988)(US Gold LTD)(Tape 1 of 2 Side A)[u][l 720-US
- Out Run (1988)(US Gold LTD)(Tape 1 of 2 Side A)[u][l 720-US2
- Out Run (1988)(US Gold LTD)(Tape 2 of 2 Side B)[a][l 720-US
- Out Run (1988)(US Gold LTD)(Tape 2 of 2 Side B)[a][l 720-US2
- Out Run (1988)(US Gold LTD)(Tape 2 of 2 Side B)[a][l 720-US3
- Out Run (1988)(US Gold LTD)(Tape 2 of 2 Side B)[b][l 720-US
- Out Run (1988)(US Gold LTD)(Tape 2 of 2 Side B)[b][l 720-US2
- Out Run (1988)(US Gold LTD)(Tape 2 of 2 Side B)[b][l 720-US3
- Out Run (1988)(US Gold LTD)(Tape 2 of 2 Side B)[u][l 720-US
- Out Run (1988)(US Gold LTD)(Tape 2 of 2 Side B)[u][l 720-US2
- Out Run (1988)(US Gold LTD)(Tape 2 of 2 Side B)[u][l 720-US3
- Out Run Route A
- Out Run Route B
- Out Run Route C
- Out Run Route D
- Out Run Route E
- Outback
- Outlaw
- Outlaws
- Outlaws (1986)(Ultimate Play The Game)[a][l Novaload]
- Overlander (1988)(Elite Systems LTD)
- Overlander (1988)(Elite Systems LTD)[a]
- Overlander (1988)(Elite Systems LTD)[b]
- Overload (1995)(Loadstar-Softdisk Publishing Inc.)[a][l Rast
- Oxxonian (1989)(Time Warp Productions)
- Oxxonian (1989)(Time Warp Productions)[a]