Third edition of Call of Cthulhu was published in 1986.
Hardcover book which includes:
Investigator's Book - detailing information for players and gamemasters, fill rules for character generation, skills, occupations and resources.
Keeper's Book - for gamesmasters only. Full rules and illustrations for the horrific beings of the Mythos, magic, and use of the famous books in the game. Plus further notes to aid play and scenarios read to use.
Sourcebook for the 1920's - which gives abundant non-mythos data, essential for accuracy and atmosphere. A host of plans, price lists, maps, biographies, distances and non-mythos monsters upon which the inexperienced Investigators can practice their skills.
Cthulhu Companion - additional rules for players and gamemasters; new Mythos lore include many new Mythos monsters; more skills and phobias for players. Plus Sourcebook additions and scenarios
Colour Plates - eight stunning full-colour prints fully evoking in graphic details the true horror of Lovecraft's dark visions.