Games released in 1991
4,220 games in the database.
| Title | Platform | Region |
|---|---|---|
| Oh Shit! | ZX Spectrum | WOR |
| Oilmania | Commodore 64 | WOR |
| Oilmania | Atari ST | WOR |
| Oira Jajamaru! Sekai Daibouken | Game Boy | US |
| Okaasan to Issho - Niko Niko Pun | PC Engine / TurboGrafx-16 | JP |
| Ökolopoly | Atari ST | WOR |
| Olteus II | Sharp X68000 | WOR |
| Olympic I.Q. | Nintendo Entertainment System | KR |
| Omega Race | Mega Drive | WOR |
| Omnibus GmbH | Commodore 64 | WOR |
| Once Upon A Time - Abracadabra | Atari ST | WOR |
| Once Upon A Time - Abra Cadabra | MS-DOS | WOR |
| Once Upon A Time - Baba Yaga | MS-DOS | WOR |
| Once Upon A Time - Baba Yaga | Atari ST | WOR |
| Once Upon A Time - Little Red Riding Hood | MS-DOS | WOR |
| One Armed Bandit | Windows 3.x | — |
| Onigashima Pachinkoten | Game Boy | JP |
| Online Backgammon | Atari ST | WOR |
| Onslaught | Mega Drive | WOR |
| On Susan | ZX Spectrum | WOR |
| On The Moon | Commodore 64 | WOR |
| Ooops Up | Commodore 64 | WOR |
| Opaque Dungeons | Commodore 64 | WOR |
| Open de Palm Springs, L' | Philips CD-i | FR |
| Open Minded | Nintendo Entertainment System | WOR |
| Opera Super Sports | Amstrad CPC | WOR |
| Operation C | Game Boy | JP |
| Operation Merkur | Commodore 64 | WOR |
| Operation Neptune | MS-DOS | WOR |
| Operation Program Cleaner | Amstrad CPC | WOR |
| Operation Secret Storm | Nintendo Entertainment System | US |
| Opium | Commodore 64 | WOR |
| OptImage CD-I 220 Adjustment Disc | Philips CD-i | US |
| Orbit 2000 | Atari ST | EU |
| Orb Quest | ZX Spectrum | WOR |
| Orion Odyssey : The Search For The Magic Ankh | MS-DOS | WOR |
| Ork | Atari ST | WOR |
| Ork | Amiga | EU |
| Ortografia | Atari 7800 | WOR |
| Otaku no Seiza - An Adventure in the Otaku Galaxy | Nintendo Entertainment System | JP |
| Ougon No Rashinban | Sharp X68000 | WOR |
| Out of This World | Amiga | US |
| Out Of This World | MS-DOS | WOR |
| OutRun | Game Gear | EU |
| OutRun | Mega Drive | CN |
| Out Run Europa | Atari ST | WOR |
| Out Run Europa | ZX Spectrum | WOR |
| Out Run Europa | Amstrad CPC | WOR |
| Out Run Europa | Commodore 64 | EU |
| OutRun Europa | Amiga | EU |
| OutRun Europa | Game Gear | EU |
| Outzone | Amiga | EU |
| Outzone | Atari ST | WOR |
| Over Horizon - Fei Li Hangdao | Nintendo Entertainment System | EU |
| Override | PC Engine / TurboGrafx-16 | JP |
| Over The Net | MS-DOS | WOR |
| Over The Net | Commodore 64 | WOR |
| Ovni | MS-DOS | WOR |
| Oxford Softworks, The - Go Player | Amiga | EU |
| Oxyd 2 | Atari ST | WOR |