Game & Watch
The Game & Watch is a series of small, hand-held video games made by Gunpei Yokoi of Nintendo from 1980 to 1991.  The games were usually simplistic (For example, "Chef" required keeping food in the air). The Game & Watch was invented before the Game Boy. Until 1985 with the Nintendo Entertainment System, the Game & Watch was Nintendo's only foothold in the North American video game market.