Players take control of a trio of gigantic monsters trying to survive against onslaughts of military forces. Each round is completed when a particular city is completely reduced to rubble. The player can climb any of the buildings, punching them to pieces and reducing them to rubble. Non-playable human characters within the levels can also be punched or grabbed and food items can be eaten. The player's monster receives damage from enemy bullets, sticks of dynamite, shells, punches from other monsters, and falls. Health is recovered by eating food items such as fruit, roast chicken, or soldiers. If a monster takes too much damage, it reverts into naked human form and starts walking off the screen sideways, covering its body with its hands. In this state, players can be eaten by another monster. If the player continues, the human mutates back into the monster or (if the human walked off the screen) flies in on a blimp (but has lost their score), with a full life bar. The game was a financial success in arcades, and one of the last successful titles for Bally/Midway