| Groups (developers) | Abbr. | Country | City | Rating | |
|---|---|---|---|---|---|
| Continental Adventures | 0.00 ±0.0 | ||||
| Control Data Corporation | 0.00 ±0.0 | ||||
| Copy Crew Amsterdam | 0.00 ±0.0 | ||||
| Copy Crew Zambrow | 0.00 ±0.0 | ||||
| Copy Service Stuttgart | Germany | 0.00 ±0.0 | |||
| Coronado Publishers, Inc. | 0.00 ±0.0 | ||||
| Cosine | United Kingdom | 0.00 ±0.0 | |||
| Cosmi | 0.00 ±0.0 | ||||
| Counter Software | 0.00 ±0.0 | ||||
| Covox, Inc. | 0.00 ±0.0 | ||||
| Crackers International | 0.00 ±0.0 | ||||
| Crazy Atarians | Poland | Gdansk (Gdańsk) | 0.00 ±0.0 | ||
| Creative Computing Press | 0.00 ±0.0 | ||||
| Creative Computing Software | 0.00 ±0.0 | ||||
| Creative Sparks | 0.00 ±0.0 | ||||
| Crisis Soft | Poland | 0.00 ±0.0 | |||
| Crystal Computer | 0.00 ±0.0 | ||||
| Crystal Microsoft | 0.00 ±0.0 | ||||
| CTE | 0.00 ±0.0 | ||||
| CWS Software | 0.00 ±0.0 |
