Call of Cthulhu

Call of Cthulhu is a horror fiction role-playing game based on H. P. Lovecraft’s story of the same name and the associated Cthulhu Mythos.

The game, often abbreviated as CoC, is published by Chaosium; it was first released in 1981 and is in its seventh edition, with licensed foreign language editions available as well.

Its game system is based on Chaosium’s Basic Role-Playing (BRP) with additions for the horror genre. These include special rules for sanity and luck.