Game System
- Crazy Creaturs of Dr. Gloom3
- Creative Mountain Games3
- Crime Network Cosa Nostra3
- Crime Scene D20 rules3
- Crimson Skies Air Action3
- Crown of Roses3
- Crude: The Oil Game3
- Crude: The Oil Games3
- Cryptid Codex3
- Cthulhu Live (Homebrew)3
- Cthulhu Tech3
- Cuisine a la Card3
- Cultist/Occultist3
- Cultivator3
- Cutthroat Cavernsw3
- Cyberpunk v.33
- Cyberpunk CCG3
- D&D Minis and Engle Matrix Games3
- D.C. HEROES by Mayfair Games3
- D6: Dungeons, Dudes, Dames, Danger, Dice, and Dragons!3