Group
- Castles & Chemo, Inc.3
- Catalyst Game Labs304
- Cavegirl Productions2
- Cephalofair Games8
- Chainmail Legion17
- Chamber Band1
- Chaos Haunted & Historical Tours9
- Chaosium1
- Cheese Weasel1
- Chicago Swordplay Guild1
- Chivalry Games2
- Christian Gamers Guild2
- Cincinnati Arsenal Gaming6
- Circle City Gaming63
- Claire Knits6
- CoGG17
- Columbia Games9
- ComedySportz Indianapolis1
- CoolMiniOrNot Inc19
- Corvus Belli6