 | Agent X (prototype, rev 1) (clone of: cloak) | 1983 | Atari | agentx1 | | 0.00 |
| Agent X (prototype, rev 2) (clone of: cloak) | 1983 | Atari | agentx2 | | 0.00 |
| Agent X (prototype, rev 3) (clone of: cloak) | 1983 | Atari | agentx3 | | 0.00 |
| Agent X (prototype, rev 4) (clone of: cloak) | 1983 | Atari | agentx4 | | 0.00 |
| | Airborne Avenger | 1977 | Atari | aavenger | | 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 |
 | Asteroids (rev 1) (clone of: asteroid) | 1979 | Atari | asteroid1 | | 0.00 |
| Asteroids (rev 2) (clone of: asteroid) | 1979 | Atari | asteroid2 | | 0.00 |
| Asteroids (rev 4) | 1979 | Atari | asteroid | Shooter / Field | 9.65 |
 | Asteroids Deluxe (rev 1) (clone of: astdelux) | 1980 | Atari | astdelux1 | | 0.00 |
| Asteroids Deluxe (rev 2) (clone of: astdelux) | 1980 | Atari | astdelux2 | | 0.00 |
| Asteroids Deluxe (rev 3) | 1980 | Atari | astdelux | Shooter / Field | 5.87 |
 | Atari Baseball (set 1) | 1979 | Atari | abaseb | Sports / Baseball | 0.00 |
| Atari Baseball (set 2) (clone of: abaseb) | 1979 | Atari | abaseb2 | Sports / Baseball | 0.00 |
 | Atari Football (4 players) (clone of: atarifb) | 1979 | Atari | atarifb4 | Sports / Football Amer. | 0.00 |
| Atari Football (revision 1) (clone of: atarifb) | 1978 | Atari | atarifb1 | Sports / Football Amer. | 0.00 |
| Atari Football (revision 2) | 1978 | Atari | atarifb | Sports / Football Amer. | 5.75 |
 | Atari Mini Golf (prototype) | 1978 | Atari | mgolf | Sports / Golf | 0.00 |
| | Atari PSX | 1996 | Atari | atpsx | BIOS | 3.29 |
