| System (Setting) | Publications | Articles |
|---|---|---|
| d100 (APOCTHULHU) | 3 | 27 |
| d6-lite | 1 | 1 |
| Dagon's Bones | 1 | 1 |
| Daredevils | 2 | 5 |
| Dark Aeons | 27 | 0 |
| Dark Conspiracy | 5 | 14 |
| Dark Cults | 1 | 1 |
| De Profundis | 2 | 9 |
| Dead Man on Campus | 1 | 1 |
| Decampment | 0 | 0 |
| Delta Green | 46 | 15 |
| Dice of Arkham | 1 | 1 |
| Do You Worship Cthulhu? | 1 | 1 |
| Don't Let Them Take You Alive | 4 | 0 |
| Don't Look Back | 3 | 3 |
| Don't Mess With Cthulhu | 3 | 3 |
| Don't Wake Up Cthulhu! | 1 | 1 |
| The Doom That Came to Atlantic City | 1 | 1 |
| Dream Phone of Cthulhu | 1 | 1 |
| Dreamescape | 1 | 1 |
| Dreamlands Adventures | 1 | 1 |
| The Dream-Quest of Unknown Kadath | 1 | 1 |
| Dungeon Crawl Classics | 2 | 0 |
| Dungeon World | 1 | 0 |
| Dungeons & Dragons | 0 | 1 |
| Dungeons and Dagon | 1 | 0 |
| Dungeons and Dragons (5th Edition) | 1 | 0 |
| Dungeons and Dragons | 19 | 6 |