From publisher blurb:
Cowboy World is a pen and paper role-playing game about badass people kicking butt in the Old American West.
It is based on the Apocalypse World system.
It focuses on drama and conflict.
It is rules-light.
Character creation is fast. You can play any genre-appropriate character you like.
It has no hit point system. Combat is fast, cinematic and deadly.
And if you want to play a game of weird steampunky horror set in the Old West, the last chapter, Going Weird, transforms Cowboy World into just that.