Handheld electronic games. Just as dedicated consoles were waning in popularity in the West, they briefly surged in popularity in Japan. These TV geemu were often based on licensed designs from the American companies, manufactured by television manufacturers such as Toshiba and Sharp. Notably, Nintendo entered the video game market during this period alongside its current traditional and electronic toy product lines, producing the series of Color TV-Game consoles in partnership with Mitsubishi. Growth of video game arcades and the golden age After the ball-and-paddle market saturation in 1975, game developers began looking for new ideas for games, buoyed by the ability to use programmable microprocessors rather than analog components. Taito designer Tomohiro Nishikado, who had developed Gun Fight previously, was inspired by Atari's Breakout to create a shooting-based game, Space Invaders, first released in Japan in 1978. Space Invaders introduced or popularized several important concepts in arcade video games, including play regulated by lives instead of a timer or set score, gaining extra lives through accumulating points, and the tracking of the high score achieved on the machine. It was also the first game to confront the player with waves of targets that shot back at the player and the first to include background music during game play, albeit a simple four-note loop. Space Invaders was an immediate success in Japan, with some arcades created solely for Space Invaders machines. While not quite as popular in the United States, Space Invaders became a hit as Midway, serving as the North American manufacturer, moved over 60,000 cabinets in 1979. Space Invaders led off what is considered to be the golden age of arcade games which lasted from 1978 to 1982. Several influential and best-selling arcade games were released during this period from Atari, Namco, Taito, Williams, and Nintendo, including Asteroids (1979), Galaxian (1979), Defender (1980), Missile Command (1980), Tempest (1981), and Galaga (1981). Pac-Man, released in 1980, became a popular culture icon, and a new wave of games appeared that focused on identifiable characters and alternate mechanics such as navigating a maze or traversing a series of platforms. Aside from Pac-Man and its sequel, Ms. Pac-Man (1982), the most popular games in this vein during the golden age were Donkey Kong (1981) and Q*bert (1982). Games like Pac-Man, Donkey Kong and Q*bert also introduced the concept of narratives and characters to video games, which led companies to adopt these later