Game Boy
The Game Boy was the first handheld game console sold by Nintendo that featured interchangeable ROM cartridges for each game, unlike the Game &amp; Watch that had a different system for each game. Released in 1989 in Japan, it is one of the world's best-selling game console lines, with over 100 million units sold worldwide. The Game Boy was the first console in the Game Boy family and sold in a number of different revisions and variations, including the streamlined Game Boy Pocket and Game Boy Light in Japan. In 1998, Nintendo had plans to release the Game Boy Advance, but it had to be pushed back, releasing the Game Boy Color, a new Game Boy platform with color graphics. Combined, the Game Boy and Game Boy Color sold 118.69 million units worldwide.