| Atari 2600 Roms Name | File Size (Kb) | Downloads |
|---|---|---|
| Obelix (1983) (Atari) (NTSC by Thomas Jentzsch) | 4 Kb | 5 |
| Obelix (1983) (Atari) (NTSC) | 5 Kb | 8 |
| Obelix (1983) (Atari) (PAL) [!] | 4 Kb | 8 |
| Obelix (1983) (Atari) [!] | 4 Kb | 15 |
| Ocean City (Prototype) | 3 Kb | 9 |
| Ocean City Defender (Zellers) | 3 Kb | 15 |
| Octopus (AKA Name That Game) (Carrere Video) (PAL) [!] | 3 Kb | 8 |
| Off the Wall (1989) (Atari) (PAL) [!] | 7 Kb | 8 |
| Off the Wall (1989) (Atari) (PAL) [b1] | 7 Kb | 4 |
| Off the Wall (1989) (Atari) | 7 Kb | 13 |
| Off Your Rocker (1983) (Amiga) | 3 Kb | 12 |
| Oh No! (Version 1) (17-01-2003) (AD) | 18 Kb | 7 |
| Oh No! (Version 2) (18-01-2003) (AD) | 18 Kb | 5 |
| Oh No! (Version 3) (18-01-2003) (AD) | 18 Kb | 5 |
| Oh No! (Version 4) (22-01-2003) (AD) | 18 Kb | 9 |
| Oink! (1983) (Activision) (PAL) [!] | 3 Kb | 8 |
| Oink! (1983) (Activision) (PAL) [p1][!] | 3 Kb | 4 |
| Oink! (1983) (Activision) [!] | 3 Kb | 20 |
| Oink! (1983) (Activision) [o1] | 3 Kb | 5 |
| Oink! (CCE) | 3 Kb | 5 |