Jawbreaker is a video game programmed by John Harris and released in 1981 for the Atari 400/800 by On-line Systems. It is essentially a Pac-Man clone, in that a small yellow set of jaws is moved around the map to pick up small dots while avoiding the 'jawbreakers' which roll around the map. If the jaws bite the jawbreaker, they will be destroyed and the player will lose a life. It was released for the Atari 2600 and later the Apple II.
John Harris also developed and released ports of the game for the Atari 2600 under Tigervision (1982), and the Apple II (1981) under On-Line Systems. A game by the same name for the Commodore 64 was released in 1983, but coded by Doug Whittaker and Chuck Bueche and bore little resemblance to the original version.