The game focuses on exploration and item collection. Players assume the role of an anonymous robot defending a robot world under siege by grotesque meat beasts. Players gain strength and abilities throughout each playthrough in an attempt to "become fight enough" to defeat the mother of the meat beasts: the Megabeast. The player can also unlock new upgrades and areas by completing achievements, which may then appear on subsequent runs. The game features roguelike permadeath, local co-op capabilities, and over four billion unique runs.