Group
- Cards Against Humanity3
- Cards by Jennifer4
- Castles & Chemo, Inc.4
- Catalyst Game Labs316
- Catan Studio100
- Chainlink Productions1
- Chainmail Legion19
- Chaldea1
- Chaos Crusades LLC1
- Chaos Haunted & Historical Tours9
- Chaos Warren Games1
- Chaosium159
- Chaosium Inc2
- Cheese Weasel Logisitics1
- Chicago City Gamers2
- Chicago Dungeon Crawl84
- Chicago Public Library 1
- Chip Theory Games48
- Christian Gamers Guild3
- Cincinnati Arsenal Gaming146