games starting with O, page 1
O2
| ROM name | o2 |
| Manufacturer | Silicon Graphics Inc. |
| Year | 1996 |
| Genre | ? |
| Players | ? |
| Status | preliminary |
| Downloads | 25 |
Oak Solutions 16 bit SCSI Interface
| ROM name | arc_scsi_oak |
| Manufacturer | ? |
| Year | ? |
| Genre | ? |
| Players | ? |
| Status | N/A |
| Downloads | 3 |
OB68K1A Single Board Computer
| ROM name | ob68k1a |
| Manufacturer | Omnibyte |
| Year | 1982 |
| Genre | ? |
| Players | ? |
| Status | good |
| Downloads | 21 |
Oba-Oba (old hardware)
| ROM name | obaobao |
| Manufacturer | Taito do Brasil |
| Year | 1980 |
| Genre | ? |
| Players | ? |
| Status | preliminary |
| Downloads | 25 |
Oba-Oba (set 1)
| ROM name | obaoba |
| Manufacturer | Taito do Brasil |
| Year | 1980 |
| Genre | ? |
| Players | ? |
| Status | preliminary |
| Downloads | 40 |
Oba-Oba (set 2)
| ROM name | obaoba1 |
| Manufacturer | Taito do Brasil |
| Year | 1980 |
| Genre | ? |
| Players | ? |
| Status | preliminary |
| Downloads | 23 |
OC Jeu Video TV Karvan
| ROM name | krvnjvtv |
| Manufacturer | SOE |
| Year | 1979 |
| Genre | ? |
| Players | ? |
| Status | good |
| Downloads | 0 |
OC-2000
| ROM name | oc2000 |
| Manufacturer | SOE |
| Year | 1979 |
| Genre | ? |
| Players | ? |
| Status | good |
| Downloads | 0 |
Ocean Paradise (V101US)
| ROM name | oceanpar101us |
| Manufacturer | IGS |
| Year | 1999 |
| Genre | ? |
| Players | ? |
| Status | good |
| Downloads | 24 |
Ocean Paradise (V105US)
| ROM name | oceanpar |
| Manufacturer | IGS |
| Year | 1999 |
| Genre | ? |
| Players | ? |
| Status | preliminary |
| Downloads | 141 |
Ocean to Ocean (Medal) (DECO Cassette MD) (No.10/Ver.1,Japan)
| ROM name | cocean1a |
| Manufacturer | Data East Corporation |
| Year | 1981 |
| Genre | Miscellaneous |
| Players | 1 |
| Status | good |
| Downloads | 56 |
Ocean to Ocean (Medal) (DECO Cassette MD) (No.10/Ver.6,US)
| ROM name | cocean6b |
| Manufacturer | Data East Corporation |
| Year | 1981 |
| Genre | Miscellaneous |
| Players | 1 |
| Status | good |
| Downloads | 34 |
Ocean-240 Test ROM
| ROM name | okean240t |
| Manufacturer | <unknown> |
| Year | 1986 |
| Genre | ? |
| Players | ? |
| Status | preliminary |
| Downloads | 13 |
Ocean-240 with FDD
| ROM name | okean240a |
| Manufacturer | <unknown> |
| Year | 1986 |
| Genre | ? |
| Players | ? |
| Status | preliminary |
| Downloads | 16 |
Ocha-Ken Hot Medal
| ROM name | ochaken |
| Manufacturer | Sega |
| Year | 2007 |
| Genre | ? |
| Players | ? |
| Status | preliminary |
| Downloads | 48 |
Octane (Version 6.5 Rev 4.9 05/22/03)
| ROM name | octane |
| Manufacturer | Silicon Graphics Inc |
| Year | 1997 |
| Genre | ? |
| Players | ? |
| Status | preliminary |
| Downloads | 31 |
Octopus (Nova) (German) (MPU4) (OCT 0.3)
| ROM name | m4octo |
| Manufacturer | Nova |
| Year | 199? |
| Genre | ? |
| Players | ? |
| Status | preliminary |
| Downloads | 39 |
Octopussy
| ROM name | octopussy |
| Manufacturer | Covielsa |
| Year | 1990 |
| Genre | ? |
| Players | ? |
| Status | preliminary |
| Downloads | 26 |
Odds On (Barcrest) (MPU3)
| ROM name | m3oddson |
| Manufacturer | Barcrest |
| Year | 198? |
| Genre | ? |
| Players | ? |
| Status | preliminary |
| Downloads | 30 |
Odeon Twister (v1.4)
| ROM name | odeontw |
| Manufacturer | CD Express |
| Year | 1998 |
| Genre | ? |
| Players | ? |
| Status | preliminary |
| Downloads | 6 |
Odeon Twister 2 (v202.19)
| ROM name | odeontw2 |
| Manufacturer | CD Express |
| Year | 1998 |
| Genre | ? |
| Players | ? |
| Status | preliminary |
| Downloads | 3 |
Odin
| ROM name | odin |
| Manufacturer | Peyper |
| Year | 1985 |
| Genre | ? |
| Players | ? |
| Status | preliminary |
| Downloads | 47 |
Odin (prototype)
| ROM name | odinp |
| Manufacturer | Peyper |
| Year | 1985 |
| Genre | ? |
| Players | ? |
| Status | preliminary |
| Downloads | 32 |
Odin De Luxe
| ROM name | odin_dlx |
| Manufacturer | Sonic |
| Year | 1985 |
| Genre | ? |
| Players | ? |
| Status | preliminary |
| Downloads | 37 |
Odisea Paris-Dakar
| ROM name | odisea |
| Manufacturer | Peyper |
| Year | 1987 |
| Genre | ? |
| Players | ? |
| Status | preliminary |
| Downloads | 40 |
Odyssey
| ROM name | odyssey |
| Manufacturer | Silicon Gaming |
| Year | 1998 |
| Genre | ? |
| Players | ? |
| Status | preliminary |
| Downloads | 30 |
Odyssey 2 (US)
| ROM name | odyssey2 |
| Manufacturer | Magnavox |
| Year | 1979 |
| Genre | ? |
| Players | ? |
| Status | good |
| Downloads | 2 |
Odyssey 3 Command Center (US, prototype)
| ROM name | odyssey3 |
| Manufacturer | Philips |
| Year | 1983 |
| Genre | ? |
| Players | ? |
| Status | good |
| Downloads | 25 |
Oedo Fight (Japan, Bloodless version)
| ROM name | oedfighta |
| Manufacturer | Kaneko |
| Year | 1994 |
| Genre | Fighter |
| Players | 2 |
| Status | good |
| Downloads | 38 |
Oedo Fight (Japan, Bloodshed version)
| ROM name | oedfight |
| Manufacturer | Kaneko |
| Year | 1994 |
| Genre | Fighter |
| Players | 2 |
| Status | good |
| Downloads | 36 |
Off Road Challenge (v1.00)
| ROM name | offroadc0 |
| Manufacturer | Midway |
| Year | 1997 |
| Genre | Driving |
| Players | 1 |
| Status | good |
| Downloads | 29 |
Off Road Challenge (v1.10)
| ROM name | offroadc1 |
| Manufacturer | Midway |
| Year | 1997 |
| Genre | Driving |
| Players | 1 |
| Status | good |
| Downloads | 25 |
Off Road Challenge (v1.30)
| ROM name | offroadc3 |
| Manufacturer | Midway |
| Year | 1997 |
| Genre | Driving |
| Players | 1 |
| Status | good |
| Downloads | 26 |
Off Road Challenge (v1.40)
| ROM name | offroadc4 |
| Manufacturer | Midway |
| Year | 1997 |
| Genre | Driving |
| Players | 1 |
| Status | good |
| Downloads | 26 |
Off Road Challenge (v1.50)
| ROM name | offroadc5 |
| Manufacturer | Midway |
| Year | 1997 |
| Genre | Driving |
| Players | 1 |
| Status | good |
| Downloads | 32 |
Off Road Challenge (v1.63)
| ROM name | offroadc |
| Manufacturer | Midway |
| Year | 1997 |
| Genre | Driving |
| Players | 1 |
| Status | good |
| Downloads | 153 |
Off The Charts (Russian)
| ROM name | otchart |
| Manufacturer | WMS |
| Year | 2000 |
| Genre | ? |
| Players | ? |
| Status | preliminary |
| Downloads | 29 |
Off the Wall (2-player cocktail)
| ROM name | offtwallc |
| Manufacturer | Atari Games |
| Year | 1991 |
| Genre | Ball & Paddle |
| Players | 2 |
| Status | good |
| Downloads | 29 |
Off the Wall (2/3-player upright)
| ROM name | offtwall |
| Manufacturer | Atari Games |
| Year | 1991 |
| Genre | Ball & Paddle |
| Players | 3 |
| Status | good |
| Downloads | 76 |
Off the Wall (Sente) (10/16/84)
| ROM name | otwalls |
| Manufacturer | Bally/Sente |
| Year | 1984 |
| Genre | Tennis |
| Players | 2 |
| Status | good |
| Downloads | 70 |
Off Your Face (Bellfruit) (Scorpion 4) (set 1)
| ROM name | sc4oyf |
| Manufacturer | BFM |
| Year | 200? |
| Genre | ? |
| Players | ? |
| Status | preliminary |
| Downloads | 23 |
Off Your Face (Bellfruit) (Scorpion 4) (set 2)
| ROM name | sc4oyfa |
| Manufacturer | BFM |
| Year | 200? |
| Genre | ? |
| Players | ? |
| Status | preliminary |
| Downloads | 14 |
Offensive (Spanish bootleg of Scramble)
| ROM name | offensiv |
| Manufacturer | bootleg (Video Dens) |
| Year | 1981 |
| Genre | Shoot-'Em-Up |
| Players | 2 |
| Status | good |
| Downloads | 29 |
Office Yeo In Cheon Ha (version 1.2)
| ROM name | officeye |
| Manufacturer | Danbi |
| Year | 2001 |
| Genre | ? |
| Players | ? |
| Status | preliminary |
| Downloads | 66 |
Offroad Thunder
| ROM name | offrthnd |
| Manufacturer | Midway Games |
| Year | 2000 |
| Genre | Driving |
| Players | 1 |
| Status | preliminary |
| Downloads | 52 |
Oh La La (Stella)
| ROM name | st_ohla |
| Manufacturer | Stella |
| Year | 199? |
| Genre | ? |
| Players | ? |
| Status | preliminary |
| Downloads | 32 |
Oh My God! (Japan)
| ROM name | ohmygod |
| Manufacturer | Atlus |
| Year | 1993 |
| Genre | Puzzle |
| Players | 2 |
| Status | good |
| Downloads | 62 |
Oh! Bakyuuun (Japan, OB1/VER.A)
| ROM name | ohbakyuun |
| Manufacturer | Eighting / Raizing / Namco |
| Year | 1999 |
| Genre | Gun |
| Players | 2 |
| Status | good |
| Downloads | 37 |
Oh! Paipee (Japan 890227)
| ROM name | ohpaipee |
| Manufacturer | Nichibutsu |
| Year | 1989 |
| Genre | Mature |
| Players | 1 |
| Status | good |
| Downloads | 69 |
Oigas (bootleg)
| ROM name | oigas |
| Manufacturer | bootleg |
| Year | 1986 |
| Genre | Ball & Paddle |
| Players | 2 |
| Status | good |
| Downloads | 28 |
