RailGods of Hysterra sends 1 to 5 players on a cooperative survival adventure set in a world that has been reshaped by cosmic entities known as the Great Old Ones. Players assume the roles of Dreamers, awakened and inextricably linked to a mobile, living entity called a Railgod. The primary objective is to navigate this reality warped by madness, moving between the last settlements and confronting the changed world.