| Game Name | System |
|---|
| Over The Moon (Barcrest) (MPU4) (OTN 0.5 C) | MAME |
| Over The Moon (Barcrest) (MPU4) (OTN 0.5 D) | MAME |
| Over The Moon (Barcrest) (MPU4) (OTN 0.5 K) | MAME |
| Over The Moon (Barcrest) (MPU4) (OTN 0.5 Y) | MAME |
| Over The Moon (Barcrest) (MPU4) (OTN 0.5 YD) | MAME |
| Over The Moon (Barcrest) (MPU4) (OTN 0.5) | MAME |
| Over The Moon (Barcrest) (MPU4) (OTT 0.2 AD) | MAME |
| Over The Moon (Barcrest) (MPU4) (OTT 0.2 B) | MAME |
| Over The Moon (Barcrest) (MPU4) (OTT 0.2 BD) | MAME |
| Over The Moon (Barcrest) (MPU4) (OTT 0.2 D) | MAME |
| Over The Moon (Barcrest) (MPU4) (OTT 0.2 K) | MAME |
| Over The Moon (Barcrest) (MPU4) (OTT 0.2 KD) | MAME |
| Over The Moon (Barcrest) (MPU4) (OTT 0.2 R) | MAME |
| Over The Moon (Barcrest) (MPU4) (OTT 0.2 RD) | MAME |
| Over The Moon (Barcrest) (MPU4) (OTT 0.2 Y) | MAME |
| Over The Moon (Barcrest) (MPU4) (OTT 0.2 YD) | MAME |
| Over The Moon (Barcrest) (MPU4) (OTT 0.2) | MAME |
| Over The Moon (Barcrest) (MPU4) (OTU 0.1 AD) | MAME |
| Over The Moon (Barcrest) (MPU4) (OTU 0.1 B) | MAME |
| Over The Moon (Barcrest) (MPU4) (OTU 0.1 BD) | MAME |
| Over The Moon (Barcrest) (MPU4) (OTU 0.1 D) | MAME |
| Over The Moon (Barcrest) (MPU4) (OTU 0.1 K) | MAME |
| Over The Moon (Barcrest) (MPU4) (OTU 0.1 KD) | MAME |
| Over The Moon (Barcrest) (MPU4) (OTU 0.1 R) | MAME |
| Over The Moon (Barcrest) (MPU4) (OTU 0.1 RD) | MAME |
| Over The Moon (Barcrest) (MPU4) (OTU 0.1 Y) | MAME |
| Over The Moon (Barcrest) (MPU4) (OTU 0.1 YD) | MAME |
| Over The Moon (Barcrest) (MPU4) (OTU 0.1) | MAME |
| Over The Moon (Maygay) (EPOCH) (1.2, set 1) | MAME |
| Over The Moon (Maygay) (EPOCH) (1.2, set 2) | MAME |
| Over The Moon Club (Maygay) (EPOCH) (set 1) | MAME |
| Over The Moon Club (Maygay) (EPOCH) (set 2) | MAME |
| Over The Rainbow (Astra, V102) | MAME |
| Over The Rainbow (Astra, V104) | MAME |
| Over The Rainbow (Bellfruit) (Scorpion 5) (set 1) | MAME |
| Over The Rainbow (Bellfruit) (Scorpion 5) (set 2) | MAME |
| Over The Rainbow (Bellfruit) (Scorpion 5) (set 3) | MAME |
| Over The Rainbow (Bellfruit) (Scorpion 5) (set 4) | MAME |
| Over The Rainbow (Bellfruit) (Scorpion 5) (set 5) | MAME |
| Over The Rainbow (Bellfruit) (Scorpion 5) (set 6) | MAME |
| Over The Top (Maygay) (M1A/B) (set 1) | MAME |
| Over The Top (Maygay) (M1A/B) (set 2) | MAME |
| Over Top | MAME |
| Overload (Barcrest) (MPU5) (set 1) | MAME |
| Overload (Barcrest) (MPU5) (set 2) | MAME |
| Overload (Barcrest) (MPU5) (set 3) | MAME |
| Overload (Barcrest) (MPU5) (set 4) | MAME |
| Owl Capone (10008711, NSW/ACT, Show Program) | MAME |
| Oxo (JPM) (IMPACT) (set 1) | MAME |
| Oxo (JPM) (IMPACT) (set 2) | MAME |
| Oxo (JPM) (IMPACT) (set 3) | MAME |
| Oxo (JPM) (IMPACT) (set 4) | MAME |
| Oxo (JPM) (IMPACT) (set 5) | MAME |
| Oxo (JPM) (IMPACT) (set 6) | MAME |
| Oxo Bingo (JPM) (IMPACT) (set 1) | MAME |
| Oxo Bingo (JPM) (IMPACT) (set 2) | MAME |
| Oxo Bingo (JPM) (IMPACT) (set 3) | MAME |
| Oxo Bingo (JPM) (IMPACT) (set 4) | MAME |
| Oxo Bingo (JPM) (IMPACT) (set 5) | MAME |
| Oxo Bingo (JPM) (IMPACT) (set 6) | MAME |
| Oxo Bingo (JPM) (IMPACT) (set 7) | MAME |
| Oxo Classic Gold (Electrocoin) (?) | MAME |
| Oxo Club (Electrocoin) (?) | MAME |
| Oxo Golden Bars (Electrocoin) (?) | MAME |
| Oxo Reels (Electrocoin) (?) | MAME |
| Oxo Revolution (Electrocoin) (?) | MAME |
| Ozma Wars (Model Racing bootleg) | MAME |
| Ozma Wars (set 1) | MAME |
| Ozma Wars (set 2) | MAME |
| Ozon I | MAME |
| Ozzie Ozzie Ozzie (Maygay) (EPOCH) ( .2, set 2) | MAME |
| Ozzie Ozzie Ozzie (Maygay) (EPOCH) (0.2, set 8) | MAME |
| Ozzie Ozzie Ozzie (Maygay) (EPOCH) (0.2, set 9) | MAME |
| Ozzie Ozzie Ozzie (Maygay) (EPOCH) (1.1, set 5) | MAME |
| Ozzie Ozzie Ozzie (Maygay) (EPOCH) (1.1, set 6) | MAME |
| Ozzie Ozzie Ozzie (Maygay) (EPOCH) (2.Z, set 1) | MAME |
| Ozzie Ozzie Ozzie (Maygay) (EPOCH) (2.Z, set 7) | MAME |
| Ozzie Ozzie Ozzie (Maygay) (EPOCH) (5.J, set 3) | MAME |
| Ozzie Ozzie Ozzie (Maygay) (EPOCH) (6.J, set 4) | MAME |
| P's Attack | MAME |
| P-47 - The Freedom Fighter (Japan) | MAME |
| P-47 - The Freedom Fighter (Japan, Export) | MAME |
| P-47 - The Phantom Fighter (World) | MAME |
| P-47 Aces | MAME |
| P.I.M.P.S. | MAME |
| P.O.W. - Prisoners of War (US version 1) | MAME |
| P112 | MAME |
| P500 (NTSC) | MAME |
| P500 (PAL) | MAME |
| P8000 (16bit Board) | MAME |
| P8000 (8bit Board) | MAME |
| PB-1000 | MAME |
| PB-2000c | MAME |
| PC (CGA) | MAME |
| PC (EGA) | MAME |
| PC (Hercules) | MAME |
| PC (MDA) | MAME |
| PC (VGA) | MAME |
| PC 30 III | MAME |
| PC-100 | MAME |
