Call of Cthulhu (2nd - 6th Edition)
Achtung! Cthulhu Cthulhu by Gaslight Cthulhu Classic (1920s & 1930s) Cthulhu Dark Ages Cthulhu Now Cthulhu Rising Delta Green Dreamlands Interface Zero The Weird West World War Cthulhu
History (American West) Horror (Cthulhu Mythos) Action / Adventure (Pulp) History (Alternative) Occult Action / Adventure (Superheroes) History (Europe) War Science Fiction (Cyberpunk) History Horror (Supernatural) Modern Horror Weird / Surreal Crime (Spy / Espionage) Crime (Conspiracy) History (Americas) History (Victorian Era) Fantasy Adult / Mature History (Britain / Ireland) Science Fiction Action / Adventure Politics / Government Animal
Attribute/Stat Based (STR, CON, PER, etc) Dice (Percentile) Random Attribute Generation (during Character Creation) Skill Based (buy or gain skills)
Call of Cthulhu is a horror roleplaying game using the Basic Roleplaying system and based upon the writings of Howard Phillips Lovecraft and a few others. Lovecraft wrote during the 1920s and 1930s, and he became a cult figure before dying in 1937. Since then his stature as an author has grown, and now he is generally recognized as the major American horror-story writer of the twentieth century.
Call of Cthulhu 2nd through 6th editions are so overlapping with regards to the core rules that they are placed in the same group.