Tiny Cthulhu is likely a reference to a role-playing game (RPG) or a set of rules inspired by H.P. Lovecraft's Cthulhu Mythos. The Cthulhu Mythos is a shared universe of horror fiction that originated from Lovecraft's works and has since expanded through the writings of other authors and the creation of various games, notably the tabletop RPG "Call of Cthulhu."