Trail of Cthulhu is a tabletop role-playing game set in the horror universe created by H.P. Lovecraft. Players take on the roles of investigators who explore mysterious and often terrifying events, uncovering dark secrets and confronting cosmic horrors. The game emphasizes storytelling and atmosphere, using a unique system that focuses on investigation and problem-solving. Players gather clues, interact with various characters, and face challenges that test their sanity and resolve, all while trying to prevent the awakening of ancient deities like Cthulhu and other entities from the Cthulhu Mythos.