Group
- Cold Dinosaur Games3
- Columbia Games25
- Comedy Rock Geek Enterprises 2
- Compose Dream Games4
- ConTessa34
- CoolMiniOrNot122
- Corvus Belli Infinity5
- Corvus Belli S.L.L.1
- Coryphefish5
- Cosmic Wombat Games120
- Cosplay Deviants4
- Cosplayers United Against Harassment1
- Council of Lorien24
- Counter Clockwork Games11
- Craft Hackers6
- Crafty Gamers28
- Crafty Games4
- Creative Arts Teaching Seminars12
- Crit This!1
- Critical Hit Media LLC15