| Groups (developers) | Abbr. | Country | City | Rating | |
|---|---|---|---|---|---|
| Atsyco | 0.00 ±0.0 | ||||
| AUF | 0.00 ±0.0 | ||||
| AUGS | 0.00 ±0.0 | ||||
| Aura | United Kingdom | Salford | 0.00 ±0.0 | ||
| Aurum Soft | 0.00 ±0.0 | ||||
| Austro.Com | 0.00 ±0.0 | ||||
| Avalon Hill | 0.00 ±0.0 | ||||
| Avant-Garde Creations | 0.00 ±0.0 | ||||
| AVT, Inc. | 0.00 ±0.0 | ||||
| Awesome Technology | 0.00 ±0.0 | ||||
| AWG | 0.00 ±0.0 | ||||
| AWS | 0.00 ±0.0 | ||||
| AXDB | 0.00 ±0.0 | ||||
| Axis Komputerkunst | 0.00 ±0.0 | ||||
| Aztec Design | 0.00 ±0.0 | ||||
| The Alpha-Beta Software Group | 0.00 ±0.0 | ||||
| The Art of Games | 0.00 ±0.0 | ||||
| The Atari Club | United States | Philadelphia | 0.00 ±0.0 | ||
| The Atari OldSkoolerz | Germany | 0.00 ±0.0 | |||
| The Atari Team | Germany | Lubeca (Lübeck) | 0.00 ±0.0 |
