Chaosium
- The Complete Pegāna
- Steampunk Cthulhu
- Cthulhu's Heirs
- The Cthulhu Cycle
- The Shub-Niggurath Cycle
- Nightmare's Disciple
- The Great Old Ones
- The Book of Dzyan
- Escape from Innsmouth
- H.P. Lovecraft's Dunwich
- The Keeper's Companion 2
- H.P. Lovecraft's Kingsport
- Spawn of Azathoth
- Song of Cthulhu
- Tatters of the King
- The Yith Cycle
- Call of Cthulhu Keeper's Screen
- S. Petersen's Field Guide to Cthulhu Monsters
- S. Petersen's Field Guide to Creatures of the Dreamlands
- Made in Goatswood
- The Scroll of Thoth: Simon Magus and the Great Old Ones
- The Antarktos Cycle
- The Keeper's Companion Vol. 1
- Shadows of Yog-Sothoth
- Miskatonic University
- Arkham Tales
- Singers of Strange Songs
- The 1920s Investigator's Companion
- Malleus Monstrorum
- Mansions of Madness