Tiamat is a supremely strong and powerful 5-headed draconic goddess in the Dungeons & Dragons role-playing game. The name is taken from Tiamat, a goddess in ancient Mesopotamian mythology. She is the queen and mother of evil dragons and a member of the default pantheon of Dungeons & Dragons gods. Her symbol is a five-headed dragon.

H4 - The Throne of Bloodstone is an Official Game Adventure or "module" for the Advanced Dungeons & Dragons fantasy role-playing game.