Group
- Burning Wheel7
- C2Games and Circle City Gamers1
- C2games with Circle City Gamers1
- Calliope Games15
- Camarilla Fan Club (Midnight Dance)8
- Catalyst Game Labs255
- Chaos Haunted & Historical Tours6
- Christian Gamers Guild1
- Chronicles of the Void4
- Close To My Heart8
- Closet Gamers, Inc.1
- Corone Design1
- Costumes By Design3
- Council of Lorien14
- Crafty Games18
- Creative Arts Teaching Seminars19
- Crispy Zombie Productions3
- Crocodile Games5
- Cryptozoic Entertainment44
- Cubicle 7 Entertainment Limited56