Game System
- Dungeons & Dragons29
- Champions18
- Rifts18
- Advanced Dungeons & Dragons15
- Axis & Allies13
- Hero System12
- Hero (Champions)11
- Savage Worlds11
- Call of Cthulhu10
- D20 Modern10
- Buffy the Vampire Slayer RPG8
- GURPS8
- Palladium Fantasy8
- Shadowrun8
- Mutants & Masterminds7
- Swordmaster7
- N/A6
- Stargate SG1 d206
- Beyond the Supernatural5
- Black Knighthood Combat System5