Gunpei Yokoi in the context of "Donkey Kong (1981 video game)"

The Game Boy is a handheld game console developed by Nintendo, launched in the Japanese home market on April 21, 1989, followed by North America later that year and other territories from 1990 onwards. Following the success of the Game & Watch single-game handhelds, Nintendo developed the Game Boy to be a portable console, with interchangeable cartridges. The concept proved highly successful, and the Game Boy line became a cultural icon of the 1990s and early 2000s.

The Game Boy was designed by the Nintendo Research & Development 1 team, led by Gunpei Yokoi and Satoru Okada. The device features a dot-matrix display, a D-pad, four game buttons, a single speaker, and uses Game Pak cartridges. Its two-toned gray design included black, blue, and magenta accents, with softly rounded corners and a distinctive curved bottom-right edge. At launch in Japan it was sold as a standalone console, but in North America and Europe it came bundled with the wildly popular Tetris which fueled sales.

In the history of video games, the second-generation era refers to computer and video games, video game consoles, and handheld video game consoles available from 1976 to 1992. Notable platforms of the second generation include the Fairchild Channel F, Atari 2600, Intellivision, Odyssey 2, and ColecoVision. The generation began in November 1976 with the release of the Fairchild Channel F. This was followed by the Atari 2600 in 1977, Magnavox Odyssey² in 1978, Intellivision in 1979 and then the Emerson Arcadia 2001, ColecoVision, Atari 5200, and Vectrex, all in 1982. By the end of the era, there were over 15 different consoles. It coincided with, and was partly fueled by, the golden age of arcade video games. The generation also included the entry of handheld consoles, chiefly led by Nintendo’s foray into gaming led by the Blue Ocean philosophy of Gunpei Yokoi and the release of the Game & Watch in 1980. This peak era of popularity and innovation for the medium resulted in many games for second generation home consoles being ports of arcade games. Space Invaders, the first "killer app" arcade game to be ported, was released in 1980 for the Atari 2600, though earlier Atari-published arcade games were ported to the 2600 previously. Coleco packaged Nintendo's Donkey Kong with the ColecoVision when it was released in August 1982.

Built-in games, like those from the first generation, saw limited use during this era. Though the first generation Magnavox Odyssey had put games on cartridge-like circuit cards, the games had limited functionality and required TV screen overlays and other accessories to be fully functional. More advanced cartridges, which contained the entire game experience, were developed for the Fairchild Channel F, and most video game systems adopted similar technology. The first system of the generation and some others, such as the RCA Studio II, still came with built-in games while also being able to use cartridges. The popularity of game cartridges grew after the release of the Atari 2600. From the late 1970s to the mid-1990s, most home video game systems used cartridges until the technology was replaced by optical discs. The Fairchild Channel F was also the first console to use a microprocessor, which was the driving technology that allowed the consoles to use cartridges. Other technology such as screen resolution, color graphics, audio, and AI simulation was also improved during this era. The generation also saw the first handheld game cartridge system, the Microvision, which was released by toy company Milton Bradley in 1979.

Donkey Kong is a 1981 platform game developed and published by Nintendo for arcades. As Mario (occasionally referred to as "Jumpman" at the time), the player runs and jumps on platforms and climbs ladders to ascend a construction site in New York City and rescue Pauline (occasionally referred to as "The Lady" at the time) from the giant gorilla Donkey Kong. It is the first game in the Donkey Kong series and Mario's first appearance in a video game.

Donkey Kong was created to salvage unsold arcade cabinets following the failure of Nintendo's Radar Scope (1980), and was designed for Nintendo of America's audience. Hiroshi Yamauchi, Nintendo's president at the time, assigned the project to first-time video game designer Shigeru Miyamoto. Drawing inspiration from "Beauty and the Beast" and American media such as Popeye and King Kong, Miyamoto developed the characters and scenario and designed the game alongside chief engineer Gunpei Yokoi. Donkey Kong was the most complex arcade game released at that point, using graphics for characterization, including cutscenes to illustrate a plot, and integrating multiple unique stages into the gameplay. The game pioneered the platform genre before the term existed, is the first to feature jumping, and is one of the first video games with a damsel in distress narrative, after Sheriff. It had a limited release in Japan on July 9, 1981, before receiving a wide release in the region some weeks later.

Mario Bros. is a 1983 platform game developed and published by Nintendo for arcades. It was designed by Shigeru Miyamoto and Gunpei Yokoi, Nintendo's chief engineer. Players control Italian twin brother plumbers Mario and Luigi as they exterminate turtle-like creatures, giant flies, and crabs emerging from the sewers of New York City by knocking them upside-down and kicking them away. The Famicom/NES version was the first game to be developed by Intelligent Systems. It is part of the Mario franchise and the first spin-off of the Donkey Kong series.

The arcade and Famicom/NES versions were received positively by critics. Elements introduced in Mario Bros., such as spinning bonus coins, turtles that can be flipped onto their backs, and Luigi, were carried over to Super Mario Bros. (1985) and became staples of the Mario series.

Game & Watch is a series of handheld electronic games developed by Nintendo. Designed by Gunpei Yokoi, the first game, Ball was released in 1980 and the original production run of the devices continued until 1991. The name Game & Watch reflects their dual functionality: a single game paired with a digital clock on a segmented liquid-crystal display (LCD) screen. The Game & Watch series proved a monumental success, selling a total of 43.4 million units globally, marking Nintendo's first major worldwide success with a video game console.

Nintendo Research & Development No. 1 Department (commonly abbreviated as Nintendo R&D1 and formerly known as Nintendo Research & Development Department before splitting in 1978) was a division of Nintendo, and is its oldest development team. Its creation coincided with Nintendo's entry into the video game industry, and the original R&D1 was headed by Gunpei Yokoi. The developer has created several notable Nintendo series such as Donkey Kong, Mario, and Metroid.

R&D1 developed the hugely successful Game Boy line, which was released in 1989. They developed some of the line's most popular games, such as Super Mario Land, and created the character of Wario.

Satoru Okada (岡田 智 Okada Satoru, born January 10, 1947) is the former general manager of Nintendo Research & Engineering, the division designing and developing Nintendo handheld game consoles. He is best known for creating the original Game Boy and its successors. He was also assistant producer and director of and contributor to several Nintendo games, notably Metroid, released for the Nintendo Entertainment System in 1986.

Okada entered Nintendo in 1969 and went on to work as an engineer at Nintendo Research & Development 1 with Gunpei Yokoi, who developed the hugely successful Game & Watch and Game Boy handheld game consoles. In 1996, Yokoi left Nintendo which caused R&D1 to split, its engineers creating a portable hardware division of which Okada became the general manager. His team lacked Yokoi but nevertheless developed hugely successful handheld consoles: the Game Boy Color, Game Boy Advance, Game Boy Advance SP and Nintendo DS. Okada initially opposed the Nintendo DS' dual-screen design but was overruled by Hiroshi Yamauchi.

The Zapper is an electronic light gun accessory launched within the Nintendo Entertainment System (NES) in North America on October 18, 1985. It is a cosmetic redesign by Nintendo of America's head designer Lance Barr, based on Gunpei Yokoi's Video Shooting Series light gun (光線銃シリーズガン), which had been released in Japan for the Famicom on February 18, 1984. The Zapper requires compatible NES games, such as Duck Hunt, Wild Gunman, Gumshoe, and Hogan's Alley. Its internal optical sensor allows the player to aim at a television set and accurately shoot at in-game targets.

The Zapper bridged Nintendo's existing library of hit arcade light-gun shooter games into the NES's launch library. As distinct toys, the Zapper and R.O.B. (Robotic Operating Buddy) were key to the identity of the NES bundle, for positioning the NES's 1985–1986 launch into the North American toy market instead of into the crashed video game market.