Gunpei Yokoi was once just an assembly line worker at a Nintendo factory. But armed with inventiveness and his education, Yokoi started tinkering around in his free time. His invention gained the notice of his boss. And within twenty years, he was a star of his company, responsible for some of the biggest names in the videogame industry. Game Boy. Metroid. Donkey Kong. All of these seminal moments were guided by the genius of Yokoi, a brilliant creator with a storybook arc shattered by a tragic ending.