3DS, there was the Game & Watch series of LCD games from Nintendo. It wasn't alone: numerous other companies produced single-game handhelds that may look primitive when compared with today's portables, but still manage to out-fun some modern games. It's excellent, then, that Pica Pic exists. This slick site is home to a dozen or so fully playable recreations of classics such as Donkey Kong Jr. and Sub Attack, with the promise of more to come.
Designed by Hipopotam, the site may not be entirely legal due to its, er ... reproduction of copyrighted games, but we certainly won't tell if you want to give it a visit. Which you should. Now.