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Rule System Directory
| Rule System (sort) | Publisher (sort) | Edition | Settings | Campaigns (sort) |
|---|---|---|---|---|
| Grimm | 1st | 1 | 1 | |
| GUMSHOE | Pelgrane Press Ltd | 1st | 4 | 6 |
| GURPS | 4th | 6 | 26 | |
| GURPS | 3rd | 6 | 5 | |
| GURPS | 2 | 1 | ||
| Hackmaster | 4th | 2 | 2 | |
| Hackmaster | 1 | 3 | ||
| HackMaster Basic | 5th | 1 | 1 | |
| HârnMaster | Columbia Games | 3rd | 1 | 0 |
| Hero System | Hero Games | 6th | 2 | 15 |
| Hero System | Hero Games | 5th | 1 | 6 |
| Homebrew | 1 | 1408 | ||
| Houses of the Blooded | John Wick | 1st | 1 | 1 |
| ICON System | Last Unicorn Games | 1st | 5 | 1 |
| ICONS Superpowered Roleplaying | Ad Infinitum Adventures | 1st | 0 | 2 |
| Interlock System | R. Talsorian Games | 1st | 2 | 1 |
| Iron Kingdoms | Privateer Press | 1st | 1 | 9 |
| Ironclaw | Sanguine Productions | 1st | 0 | 0 |
| Labyrinth Lord | Goblinoid Games | 1st | 0 | 5 |
| Labyrinth Lord + AEC | Goblinoid Games | 1st | 0 | 5 |
| Legend | Rule of Cool Games | 1st | 0 | 0 |
| Legend of the Five Rings | 2 | 1 | 0 | |
| Legend of the Five Rings | 1 | 1 | 1 | |
| Legend of the Five Rings / R&K | 4 | 2 | 7 | |
| Legend of the Five Rings / R&K | 3 | 1 | 0 |
