| | Arabian Nights (Barcrest) (MPU5) (set 1) | 1969 | Barcrest | m5arab | | 0.00 |
| | Arabian Nights (Barcrest) (MPU5) (set 2) (clone of: m5arab) | 1969 | Barcrest | m5arab03 | | 0.00 |
| | Aracnis (bootleg of Scorpion on Moon Cresta hardware) (clone of: scorpion) | 1969 | bootleg | aracnis | | 0.00 |
 | Arbalester | 1989 | Seta | arbalest | Shooter / Flying Vertical | 6.50 |
 | Arcade Classics (prototype) | 1992 | Atari Games | arcadecl | Multiplay | 4.75 |
| | Arcadia (JPM) (IMPACT) | 1969 | JPM | j6arcade | | 0.00 |
| | Arcadia System BIOS | 1988 | Arcadia Systems | ar_bios | BIOS | 6.50 |
| | Arcana Heart | 2005 | Examu | acheart | | 0.00 |
| | Arcana Heart Full | 2006 | Examu | acheartf | | 8.33 |
 | Arch Rivals (rev 2.0 5/03/89) (clone of: archrivl) | 1989 | Bally Midway | archrivl2 | | 0.00 |
| Arch Rivals (rev 4.0 6/29/89) | 1989 | Bally Midway | archrivl | Sports / Basketball | 8.38 |
| | Arctic Thunder (v1.002) | 2001 | Midway Games | arctthnd | | 9.00 |
| | Arctic Wins (4XF5227H03, US) (sample of: 3bagflvt) | 1996 | Aristocrat | arcwins | | 0.00 |
 | Area 51 (Atari Games license) (clone of: area51) | 1995 | Atari Games | area51a | Shooter / Gun | 0.00 |
| Area 51 (R3000) | 1996 | Atari Games | area51 | Shooter / Gun | 7.02 |
| Area 51 (Time Warner license) (clone of: area51) | 1995 | Atari Games (Time Warner license) | area51t | Shooter / Gun | 0.00 |
 | Area 51 / Maximum Force Duo (R3000) (clone of: area51mx) | 1998 | Atari Games | a51mxr3k | Shooter / Gun | 0.00 |
| Area 51 / Maximum Force Duo v2.0 | 1998 | Atari Games | area51mx | Shooter / Gun | 6.22 |
| | Area 51: Site 4 (HD Rev 2.0, September 11, 1998) (clone of: a51site4) | 1998 | Atari Games | a51site4a | | 0.00 |
| | Area 51: Site 4 (HD Rev 2.01, September 7, 1998) | 1998 | Atari Games | a51site4 | | 6.33 |
