Nintendo Game Boy
Released in 1989, the Nintendo Game Boy was among the first handheld gaming devices. It featured an 8-bit processor with a monochrome screen with a 160x144 pixel resolution. Controls included a directional pad and four buttons: Select, Start, A and B.
While the device received early criticism due to the small display, its simplicity and convenience led to remarkable worldwide success. More than 800 games were developed for the Game Boy, many of which were released in Japan only. Some of the more popular titles that reached the United States included Super Mario Land (18.03 million units), Kirby’s Dream Land (5.13 million units), and Tetris (30.26 million units). The system also helped bring the Pokemon franchise to prominence, selling more than 31.35 million units worldwide of the Red, Green and Blue versions.