The Grim Adventures of Billy & Mandy video game pits the characters from the popular Cartoon Network television show against each other in a fighting-adventure game, filled with mayhem and chaos. In battle mode, up to four players can use a multitude of weapons in destructible arenas like the Desert of Doom and the Underworld to battle it out to be the last one standing. Players also have the option to play on their own or with a friend in mission mode, a series of 45 missions where players can unlock new weapons and characters like Hoss Delgado and the Boogey Man.