Group
- Cosmic Wombat Games53
- Cosplay Deviants4
- Costumes By Design18
- Council of Lorien21
- Craft Hackers1
- Crafty Games53
- Create & Craft, LLC22
- Creative Arts Teaching Seminars18
- Critical Hit Media3
- Critical Mass Games3
- CrossCut Games2
- Crowder College2
- Cryptozoic Entertainment32
- CrystalCommerce1
- Cubicle Seven31
- Cylindrical Head Games1
- D20 Burlesque1
- D20 Girls2
- D20 Hobbies1
- D3 Adventures2