Before the Game Boy Color, one-player hands of Uno were pretty rare. Thanks to this game, however, a quorum is no longer needed. Just like the popular color- and number-matching card game, players must whittle their sets of cards down to that trim number, One, and even lose that if they're to win. This version of the game also brings colorful animation, sound, and a new variant--Challenge Uno--to the game. You don't have to play alone, though--you can connect to a friend's copy of the game through the separately sold Game Link cable.