| | All In A Days Work (Global) (set 1) | 1969 | Global | sc1days | | 0.00 |
| | All In A Days Work (Global) (set 2) (clone of: sc1days) | 1969 | Global | sc1daysa | | 0.00 |
| | Alley Cat (Maygay) (M1A/B) | 1969 | Maygay | m1alley | | 0.00 |
| | Alley Cats (Shuffle) (L-7) | 1985 | Williams | alcat_l7 | | 0.00 |
 | Alley Master | 1986 | Cinematronics | alleymas | Sports / Bowling | 7.92 |
| | Allied System | 1977 | Allied Leisure | allied | | 0.00 |
 | Alligator Hunt | 1994 | Gaelco | aligator | Shooter / 3rd Person | 7.10 |
| Alligator Hunt (unprotected) (clone of: aligator) | 1994 | Gaelco | aligatorun | | 0.00 |
| | Almond Pinky [BET] (Japan) | 1988 | Dynax | mjapinky | | 0.00 |
| | Along The Prom (Bellfruit) (Scorpion 2/3) | 1969 | BFM | sc2prom | | 0.00 |
 | Alpha Fighter / Head On | 1969 | Data East Corporation | alphaho | Multiplay | 0.00 |
 | Alpha Mission (clone of: aso) | 1985 | SNK | alphamis | Shooter / Flying Vertical | 0.00 |
 | Alpha Mission II / ASO II - Last Guardian (NGM-007)(NGH-007) | 1991 | SNK | alpham2 | Shooter / Flying Vertical | 5.59 |
| Alpha Mission II / ASO II - Last Guardian (prototype) (clone of: alpham2) | 1991 | SNK | alpham2p | | 0.00 |
 | Alpha One (prototype, 3 lives) (clone of: mhavoc) | 1983 | Atari | alphaone | Shooter / Misc. | 0.00 |
| Alpha One (prototype, 5 lives) (clone of: mhavoc) | 1983 | Atari | alphaonea | | 0.00 |
| | Alpha One (Vision Electronics / Kyle Hodgetts) | 1988 | Vision Electronics | alpha1v | | 0.00 |
| | Alphabet (Barcrest) [A4B 1.0] (MPU4) | 1969 | Barcrest | m4alpha | | 0.00 |
 | Alpine Racer (Rev. AR2 Ver.C) (clone of: alpinerd) | 1994 | Namco | alpinerc | Unplayable | 0.00 |
| Alpine Racer (Rev. AR2 Ver.D) | 1994 | Namco | alpinerd | Unplayable | 8.88 |
