Mythos is an out-of-print collectible card game (CCG) published by Chaosium. It is based on the Cthulhu Mythos stories of the horror author H. P. Lovecraft, as well as on Chaosium's own Call of Cthulhu role-playing game.
In 1996, Chaosium decided to join the ongoing CCG-boom and published Mythos, designed by Charlie Krank. It received critical acclaim, winning the 1996 Best Card Game Origins Award, and initially sold well. Later expansions however, most notably the non-collectible Standard Game Set, did much more poorly and forced Chaosium to discontinue Mythos. The production was stopped after the release of New Aeon in 1997, only a year after the game's initial release.
In 1999, Pyramid magazine named Mythos as one of The Millennium's Best Card Games. Editor Scott Haring said "Mythos was a very deserving game, with great art and gameplay that involved more than just monsters fighting each other."