Named a "Best Book of the Year" by NPR, Slate, Publishers Weekly , and Goodreads It was a once-in-a-lifetime battle that pitted brother against brother, kid against adult, Sonic against Mario, and the United States against Japan. . . . In 1990, Nintendo had a virtual monopoly on the videogame industry. Sega was a faltering arcade company with big aspirations and even bigger personalities. But all that would change with the arrival of former Mattel executive Tom Kalinske. His unconventional tactics, combined with the blood, sweat, and bold ideas of his renegade employees, completely transformed Sega and led to a ruthless David-and-Goliath showdown with Nintendo. But Sega's success would create