Group
- Cactus Game Design8
- Cal Rea1
- Calvin Stengel5
- Chameleon Eclectic Enfert1
- Chameleon Eclectic Entert79
- Chameleon Eclectic Entert.2
- Chaosium11
- Chaosium, Inc38
- Chessex9
- Chicagoland Costumers Guild1
- Chris Thesing1
- Clash of Arms1
- Clockworks4
- Cloud Kingdom Games6
- Colin Oneill1
- Columbia Games94
- Columbio Games3
- Component Game System, Inc1
- Component Game Systems, Inc7
- Corsair Publishing4