A Time for Sacrifice is a Call of Cthulhu adventure book for the classic 1920s era. The book contains a series of 5 adventures set in the Mayan ruins scattered across Central and South America, written for the 7th ed. Call of Cthulhu Role-Playing Game. Join in and explore the ancient ruins, and the strange phenomenon surrounding their mega-lithic pyramids and structures. What mythos lie deep within the alters, will it ever be safe to explore this strange world of theirs. Walk where they walked, read the stones they carved, study the gods they worshiped, learn the mysteries they created, and make the sacrifices, they made.