The four characters have various reasons for taking on Dr. Dex Zeng, a criminal mastermind with an army at his command who predicted that the world would end in the year 2000. After New Year's Eve 1999, Dr. Zeng believed that there was an error preventing the apocalypse, so decides to correct it by destroying the world himself. The action starts with a police cordon around Zeng's office skyscraper, moving to such locales as a shopping mall, subway and Coast Guard base before finally ending at the top of Zeng's island headquarters.
Players control one of four characters as they move through urban and science fiction environments, battling waves of oncoming enemies with weapons including soda cans, knives, cars, and guns. The player can make some choices as to which territory to travel through
