| System (Setting) | Publications | Articles |
|---|---|---|
| Talisman | 0 | 0 |
| Terror in the Theatre | 1 | 1 |
| Tides of Madness | 1 | 1 |
| Tower of Madness | 3 | 3 |
| Towers of Am'harb | 1 | 1 |
| Trail of Cthulhu (Pulp) | 1 | 1 |
| Trail of Cthulhu (Purist) | 5 | 9 |
| Trail of Cthulhu | 103 | 287 |
| Traveller (Cthonian Stars) | 1 | 17 |
| Traveller | 1 | 1 |
| True 20 | 1 | 0 |
| Tunnels and Trolls | 1 | 1 |
| Two Rooms and a Boom | 1 | 1 |