

The games usually end when the player receives three misses (generally meaning "lives that are lost"). The Game & Watch games normally become harder as the player progresses, but the gameplay usually slows down every 100 points the player receives. The titles Climber, Balloon Fight, and Super Mario Bros. In a few others, such as Judge and Boxing, Game B features a two-player mode. Game B is usually a faster, more difficult version of Game A, but in some titles, such as Flagman and Bomb Sweeper, Game B is slightly different from Game A. Most Game & Watch titles have two modes: Game A and Game B. Nintendo also let the Game & Watch games be used as promotional items for businesses that put their own logos on them. Commemorative editions of Egg and Green House were given to Nintendo employees for reaching the 10 million and 20 million milestones, respectively. The Game & Watch was Nintendo's earliest product to be very successful, with the series selling a combined 43.4 million units worldwide. Some of the titles available in Game & Watch format were games as random as Ball, a simple juggling game, to well-known games such as Donkey Kong Jr. The units are based on a 4-bit CPU from the Sharp SM5xx family, and they include a small ROM and RAM area and an LCD screen driver circuit. Each Game & Watch had its own game built in, in addition to a clock and an alarm. The Game & Watch series is a series of handheld games developed by Nintendo from 1980 to 1991. Not to be confused with Nelsonic Game Watch or Gamewatch Boy.
