 | Outfoxies (World, OU2) | 1994 | Namco | outfxies | Platform / Fighter | 8.71 |
| | Outlaw (Bellfruit) (Scorpion 4) (set 1) | 1969 | BFM | sc4outlw | | 0.00 |
| | Outlaw (Bellfruit) (Scorpion 4) (set 2) (clone of: sc4outlw) | 1969 | BFM | sc4outlwa | | 0.00 |
| | Outlaw (Bellfruit) (Scorpion 4) (set 3) (clone of: sc4outlw) | 1969 | BFM | sc4outlwb | | 0.00 |
| | Outlaw (Bellfruit) (Scorpion 4) (set 4) (clone of: sc4outlw) | 1969 | BFM | sc4outlwc | | 0.00 |
| | Outlaw (JPM) (IMPACT, Club?) (clone of: j6outlaw) | 1969 | JPM | j6outlawc | | 0.00 |
| | Outlaw (JPM) (IMPACT, v3) | 1969 | JPM | j6outlaw | | 0.00 |
| | Outlaw (JPM) (IMPACT, v3) (Protocol) (clone of: j6outlaw) | 1969 | JPM | j6outlawd | | 0.00 |
 | Outline (clone of: radarzon) | 1982 | Century Electronics | outline | Maze / Outline | 0.00 |
 | OutRunners (Japan) (clone of: orunners) | 1992 | Sega | orunnersj | | 0.00 |
| OutRunners (US) (clone of: orunners) | 1992 | Sega | orunnersu | | 0.00 |
| OutRunners (World) | 1992 | Sega | orunners | Driving / Race (chase view) | 8.79 |
| | OutTrigger (JPN, USA, EXP, KOR, AUS) | 1999 | Sega | otrigger | | 0.00 |
 | Over Drive | 1990 | Konami | overdriv | Driving / Race 1st Person | 4.00 |
| | Over Moon Pt3 (Bwb) (MPU4 Video) | 1969 | BwB | v4ovrmn3 | | 0.00 |
| | Over Rev (Model 2B, Revision B) (clone of: overrev) | 1997 | Jaleco | overrevb | | 0.00 |
| | Over Rev (Model 2C, Revision A) | 1997 | Jaleco | overrev | | 6.25 |
| | Over The Moon (Barcrest) (MPU4) (set 1) | 1969 | Barcrest | m4overmn | | 0.00 |
| | Over The Moon (Barcrest) (MPU4) (set 10) (clone of: m4overmn) | 1969 | Barcrest | m4overmn__i | | 0.00 |
| | Over The Moon (Barcrest) (MPU4) (set 11) (clone of: m4overmn) | 1969 | Barcrest | m4overmn__j | | 0.00 |
