A good 5 years ahead of Nintendos Game Boy, Japanese company EPOCH released their GAME POCKET COMPUTER in 1984 only in Japan. The GPC is one of the earliest handheld gaming devices with games being sold separately on cartridge. It features a dot matrix screen, similar to the one the Game Boy used a few years later, but lacks the handiness of the Game Boy, and of course it lacks a notable games library as well. While there are 2 games built in (a simple puzzle game and a drawing program), there were only 5 games released on cartridge. Despite being technically advanced, with a 6 Mhz NEC microprocessor and 16k ROM cartridges, it was not a success.