Keystone Kapers is a platform game developed by Garry Kitchen for Activision and published for the Atari 2600 in April 1983. It was ported to the Atari 5200, Atari 8-bit family, ColecoVision, and in 1984, MSX. Inspired by Mack Sennett's slapstick Keystone Cops series of silent films, the object of the game is for Officer Keystone Kelly to catch Harry Hooligan before he can escape from a department store. Gameplay The game takes place in side-view of a three-story department store and its roof. The store is eight times wider than the screen; reaching the edge of the screen flips to the next section of the store. A mini-map at the bottom of the screen provides an overall view of the store and characters. Officer Kelly begins the game in the lower right on the first floor. The joystick moves Kelly left and right. Vertical movement between floors is accomplished by escalators at the ends of the map and a central elevator. Harry Hooligan starts the game in the center of the second floor. He immediately begins running to the right to reach the elevator to the third floor. Hooligan continues moving up the floor. If he succeeds, then he escapes. This trip takes 50 seconds, and a timer at the top of the screen counts down the remaining time. Kelly runs significantly faster than Hooligan and can normally catch him in that time in a straight run with no penalties. Kelly can use the elevator to get ahead of Hooligan, causing Hooligan to reverse direction and start back down through the store. He can jump down between levels at either end of the map, something Kelly cannot do because the escalators only go up for Kelly. Kelly has to use the elevator carefully, or risk being stuck on a higher floor while the timer runs out. Slowing Kelly's progress are obstacles like radios, beach balls, and shopping carts, which can be jumped over or ducked under under by pushing up or down on the joystick. Hitting any of these objects causes a nine-second penalty. In later levels, flying toy biplanes cause the player to lose a life upon contact. The player begins with three lives. One is lost if Hooligan remains uncaught when the timer runs out. Extra lives are awarded at every 10,000 points, up to the maximum of three. If Kelly catches Harry, points are awarded based