| System (Setting) | Publications | Articles |
|---|---|---|
| I Am Providence | 1 | 1 |
| I Am the Fourth Wall | 1 | 1 |
| I Pray God Will Curse the Writer | 1 | 0 |
| Iaa! Cthulhu! Fhtagn! | 1 | 1 |
| ICONS | 2 | 0 |
| Immortal: The Invisible War | 1 | 1 |
| Incredible Expeditions | 3 | 3 |
| Index Card RPG | 1 | 0 |
| Innsmouth Escape | 1 | 1 |
| Interface Zero | 1 | 13 |
| Into the Shadows | 1 | 1 |
| It Came from the Wild Blue Yonder | 1 | 0 |