Keystone Capers was in 1983, a game published by Activision for the Atari 2600, and later ported to the Atari 5200, Atari 8-bit family, from colecovision and msx. Inspired by a series of "Keystone" Mack Sennett slapstick cops silent movies, the aim of the game is for the employee Keystone Kelly (the user) to catch Harry Hooligan, before being able to escape from the store.
In this game, Officer Kelly and Harry are in the four-storey department store. Each round Kelly begins on the first floor in the lower right corner of the screen, while Harry begins on the second floor of the elevator door. When the 50-second countdown begins, Kelly run to the left, toward the elevators in the center of the store, the player controlling Kelly to catch Harry before the countdown is over, and before Harry can escape from the roof of the store (after Kelly takes the escalator on the roof, it can not go down until the round is over). Every time Kelly succeeds or fails, the round ends and a new round begins, if Kelly manages to catch the thief, or by one additional life. Extra life is awarded every 10000 points; however, the maximum number of lives that can be held in reserve is three. The game ends.