I wish they had kept the original reasons for the monsters:
Up to three simultaneous players control gigantic monsters who were formerly human. The game’s protagonists are George, a King Kong-like gigantic gorilla transformed by an experimental vitamin, Lizzie, a Godzilla-like dinosaur/lizard transformed by a radioactive lake, and Ralph, a giant werewolf transformed by a food additive.
Here’s your game play:
As monsters, they need to raze all buildings in a high-rise city to advance to the next level, eating people and destroying helicopters, tanks, taxis, police cars, boats, and trolleys along the way.
The monsters can climb the buildings, punching them to pieces on the way down which will eventually reduce them to rubble. The various people 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. Damage is recovered by eating the various food items such as fruit, roast chicken, or even the soldiers. If a monster takes too much damage, it reverts into a naked human and starts walking off the screen sideways, covering its modesty with its hands (and in this state, 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.
Smashing open windows generally reveals an item or person of interest, which may be helpful or harmful. Helpful items include food or money, while dangerous ones include bombs, electrical appliances, and cigarettes. Some items can be both; for example, a toaster is dangerous until the toast pops up, and a photographer must be eaten quickly before he dazzles the player’s monster with his flash, causing it to fall. When a civilian is present waving their hands at a window signaling for help, a player’s points rapidly increase when the person is grabbed. Each monster can hold only one type of person: George can hold women, Lizzy can hold middle-aged men, and Ralph can hold businessmen.
Rampage is set over the course of 128 days in cities across North America. The game starts in Peoria, Illinois and ends in Plano, Illinois. In Plano, players receive a “mega vitamin bonus” which heals all the monsters and provides a large point bonus. After this, the cycle of cities repeats five times. After 768 days, the game resets back to Day 1.