Limited to c. 50 signed copies.
The Contributor's Edition of the Call of Cthulhu rule book is based on the limited Miskatonic University Library Edition issued by Chaosium in celebration of 20 years of Call of Cthulhu in 2001. The Contributor's Edition was presented to those who had written or contibuted to Call of Cthulhu over the game's lifetime.
This version of the 20th anniversary rule book has two distinguishing features:
- Copper foil Elder Sign on the cover.
- Name page denoting a particular mythos entity - each unique to that particular book.
It is believed that only 50 or so copies of this edition exist.