When did the Game Boy come out?
Game Boy
Though it was less technically advanced than the Lynx and other competitors, the Game Boy's excellent battery life and rugged hardware and the popularity of the bundled "Tetris" and other games made it much more successful. In its first two weeks in Japan, from its release on April 21, 1989, the entire stock consisting of 300,000 units was sold; a few months later, the Game Boy's release in the United States on July 31, 1989, saw 40,000 units sold on its first day. The Game Boy and Game Boy Color combined have sold 118.69 million units worldwide, with 32.47 million units in Japan, 44.06 million in the Americas, and 42.16 million in other regions. By Japanese fiscal year 1997, before Game Boy Color's release in late-1998, the Game Boy alone had sold 64.42 million units worldwide. At a March 14, 1994 press conference in San Francisco, Nintendo vice president of marketing Peter Main answered queries about when Nintendo was coming out with a color handheld system by stating that sales of the Game Boy were strong enough that it had decided to hold off on developing a successor handheld for the near future.
Handheld game console
The Watara Supervision was released in 1992 in an attempt to compete with the Nintendo Game Boy. The first model was designed very much like a Game Boy, but it is grey in color and has a slightly larger screen. The second model was made with a hinge across the center and can be bent slightly to provide greater comfort for the user. While the system did enjoy a modest degree of success, it never impacted the sales of Nintendo or Sega. The Supervision was redesigned a final time as "The Magnum". Released in limited quantities it was roughly equivalent to the Game Boy Pocket. It was available in three colors: yellow, green and grey. Watara designed many of the games themselves, but did receive some third party support, most notably from Sachen.