Play 3 classic games simultaneously on one computer with one Controller. 3 games (Pacman , Pong , and Space-Invaders) are played at the same time. The games each take up a full screen, and are in either red, green, or blue. When two colours (games) overlap, the colours are mixed to generate the resulting colour, so it looks like all 3 games are translucent. The Atari ST version requires a joystick, but the DOS version can be played with a joystick, mouse, or keyboard.