he Hidden Shrine of Tamoachan is an adventure module for the Dungeons & Dragons (D&D) fantasy role-playing game, set in the World of Greyhawk campaign setting for use with the 1st edition Advanced Dungeons & Dragons rules. It is the first in the C-series of modules, a set of unrelated adventures originally designed for competitive play, with the C representing the first letter in the word competition.[1]

Originally printed for the 1979 Origins International Game Expo,[2] the module was made available to the general public in 1980. The Hidden Shrine of Tamoachan received generally positive reviews from critics and was ranked the 18th greatest Dungeons & Dragons adventure of all time by Dungeon magazine in 2004.[3]