In the not-so-distant future (1999 to be exact), the nations of the world have at last recognized the need for peace to avoid mutual destruction and ensure the survival of the human race. The plan to achieve world piece is strongly reminiscient of the movie The Day the Earth Stood Still: Automated weapons are unleashed, supposedly to exterminate anyone becoming an aggressor. Of course, technology goes awry, and the weapons are starting to exterminate all life on earth. The player jumps into a rusty old tank trying to blow up all the other thanks, fighters and flying saucers which now threaten humanity.