From publisher blurb:
Cosmic Horror Powered by the Apocalypse!
The universe is more terrifying than mankind can possibly imagine, but you've seen things, you know things, and you've begun to understand. Can you find a way to stop the evil always lurking in the shadows, waiting to enslave or destroy the human race? Can you survive with your sanity intact?
Mythos World is a roleplaying game of cosmic horror using the Apocalypse World engine. Players investigate bizarre events in a classic 1920s setting inspired by authors like H.P. Lovecraft, Clark Ashton Smith, Robert W. Chambers, and Robert E. Howard.