Nintendo
In 1975, Nintendo moved into the video arcade game industry with "EVR Race", designed by their first game designer, Genyo Takeda, and several more games followed. Nintendo had some small success with this venture, but the release of "Donkey Kong" in 1981, designed by Miyamoto, changed Nintendo's fortunes dramatically. The success of the game and many licensing opportunities (such as ports on the Atari 2600, Intellivision and ColecoVision) gave Nintendo a huge boost in profit and in addition, the game also introduced an early iteration of Mario, then known in Japan as Jumpman, the eventual company mascot.
Gunpei Yokoi
In 1966, Hiroshi Yamauchi, president of Nintendo at the time, came to a hanafuda factory Yokoi was working at and took notice of a toy, an extending arm, that Yokoi made for his own amusement during spare time as the company's machine maintenance man. Yamauchi ordered Yokoi to develop it as a proper product for the Christmas rush. The Ultra Hand was a huge success, and Yokoi was asked to work on other Nintendo toys including the Ten Billion Barrel puzzle, a miniature remote-controlled vacuum cleaner called the Chiritory, a baseball throwing machine called the Ultra Machine, and a "Love Tester." He worked on toys until the company decided to make video games in 1974, when he became one of its first game designers, only preceded by Genyo Takeda. While traveling on the Shinkansen, Yokoi saw a bored businessman playing with an LCD calculator by pressing the buttons. Yokoi then got the idea for a watch that doubled as a miniature video gaming pastime, and went on to create Game & Watch, a line of handheld electronic games.
In , Yamauchi appointed Yokoi to supervise "Donkey Kong", an arcade game created by Shigeru Miyamoto. Yokoi explained many of the intricacies of game design to Miyamoto at the beginning of his career, and the project only came to be approved after Yokoi brought Miyamoto's game ideas to the president's attention.