From the game's description: You all play Mud Dragons, up to some sort of hijinks such as: stealing candy from children, fighting over shiny glass beads, having a farting contest, trying to capture a princess, or building a flying machine. Except for the GM, of course, who pretty much just exists to make your life miserable. GM stands for Ginormous Mudhole, by the way, but you already knew that from other role-playing games.