Yars' Revenge is a popular Atari game in which the user controls a fly-like creature on a quest for revenge! The alien Qotile maneuvers up and down the right side of the screen and will attack the Yars behind its shield. The objective is to destroy the evil Qotile, which exists on the other side of the barrier. The Qotile can shoot at the Yar, even if the barrier is undamaged, by turning into the Swirl. The Swirl can kill the Yar anywhere, even inside the Neutral Zone.