Play as one of three monsters (alone, or with one or two partners) and smash all the buildings in the city. When buildings sustain enough damage, they collapse. Movement possible on street, up outer walls, and on rooftops.
Do damage by punching the walls of the buildings. Extra energy awarded for eating food and people found inside holes in the walls. Very much needed as you are under constant attack from defense forces (soldiers, helicopters, etc.) Energy also lost for eating electric appliances.
(fuzzy search, these MAY match the game, or they may not)