Keyston Capers was a 1983 game published by Activision for the Atari 2600, and later ported to the Atari 5200, Atari and the 8-bit family, colecovision and msx. Inspired by Mack Sennett's Keystone series of silent movie buffoonery cops, the goal of the game is for employee Keystone Kelly (the user) to catch Harry the Bully before he can break out of the department store.
In this game, Officer Kelly and Harry are in a four-story department store. Each round of Kelly starts on the first floor at the bottom right corner of the screen, while Harry starts on the second floor of the elevator door. When the 50 second countdown begins, Kelly run left towards the elevators in the center of the store, the player controls Kelly to catch Harry before the countdown ends and before Harry can escape from the roof of the store (after Kelly takes the escalator to the roof, he cannot go down until the round ends). Each time Kelly succeeds or fails, the round ends and a new round begins if Kelly manages to catch the thief or at the cost of one extra life. An extra life is awarded every 10,000 points; however, the maximum number of lives that can be in reserve is three. The game is over