Group
- Chaosium, Inc.63
- Chaturanga Concepts4
- Cheapass Games20
- Christian Gamers Guild1
- Clash of Arms2
- Clockworks12
- College of DuPage1
- Comic Images, Inc9
- Council of Lorien5
- Creative Illusions6
- Crocodile Games14
- Crystal Lake Arts, LLC3
- Cutting Edge Rules8
- D Company6
- D&R Games10
- Dark Duality Productions3
- Dark Duality Productions Inc.7
- Days of Wonder3
- Dead Ant Games6
- Decipher, Inc.59