 | 1991 Spikes (Italian bootleg) (clone of: pspikes) | 1991 | bootleg | spikes91 | | 0.00 |
| 1991 Spikes (Italian bootleg, set 2) (clone of: pspikes) | 1991 | bootleg | spikes91a | | 0.00 |
 | 2020 Super Baseball (set 1) | 1991 | SNK / Pallas | 2020bb | Sports / Baseball | 6.83 |
| 2020 Super Baseball (set 2) (clone of: 2020bb) | 1991 | SNK / Pallas | 2020bba | Sports / Baseball | 0.00 |
| 2020 Super Baseball (set 3) (clone of: 2020bb) | 1991 | SNK / Pallas | 2020bbh | Sports / Baseball | 0.00 |
| | 3DO (NTSC) | 1991 | 3DO | 3do | | 0.00 |
 | 64th. Street - A Detective Story (Japan) (clone of: 64street) | 1991 | Jaleco | 64streetj | | 0.00 |
| 64th. Street - A Detective Story (World) | 1991 | Jaleco | 64street | Fighter / 2.5D | 6.88 |
| | A.G. Soccer Ball | 1991 | Alvin G | agsoccer | | 0.00 |
 | Acrobat Mission | 1991 | UPL (Taito license) | acrobatm | Shooter / Flying Vertical | 5.87 |
| | Adders & Ladders (Barcrest) (MPU4) (A6L 0.1) | 1991 | Barcrest | m4addr | | 7.50 |
| | Adders & Ladders (Barcrest) (MPU4) (A6L 0.1C) (clone of: m4addr) | 1991 | Barcrest | m4addr6lc | | 0.00 |
| | Adders & Ladders (Barcrest) (MPU4) (A6L 0.1D) (clone of: m4addr) | 1991 | Barcrest | m4addr6ld | | 0.00 |
| | Adders & Ladders (Barcrest) (MPU4) (A6L 0.1K) (clone of: m4addr) | 1991 | Barcrest | m4addr6lk | | 0.00 |
| | Adders & Ladders (Barcrest) (MPU4) (A6L 0.1Y) (clone of: m4addr) | 1991 | Barcrest | m4addr6ly | | 0.00 |
| | Adders & Ladders (Barcrest) (MPU4) (A6L 0.1YBD) (clone of: m4addr) | 1991 | Barcrest | m4addr6lybd | | 0.00 |
| | Adders & Ladders (Barcrest) (MPU4) (A6L 0.1YD) (clone of: m4addr) | 1991 | Barcrest | m4addr6lyd | | 0.00 |
 | Agress | 1991 | Palco | agress | Puzzle / Sliding | 0.00 |
 | Alpha Mission II / ASO II - Last Guardian (NGM-007)(NGH-007) | 1991 | SNK | alpham2 | Shooter / Flying Vertical | 9.25 |
| Alpha Mission II / ASO II - Last Guardian (prototype) (clone of: alpham2) | 1991 | SNK | alpham2p | | 0.00 |
