UNO is a game for two or more players in which the object is to get rid of all your cards before your opponent does. If you are the first player to go out, you are awarded the point values of all the cards still held by other players. The first player to reach a certain number of points (usually 500) wins. UNO uses a special deck of 108 cards that features number cards (0-9) and word cards. Word cards cause special actions when played (such as reversing the direction of play or causing an opponent to pick up cards and lose a turn). Each card in the deck belongs to one of four colors: Red, Green, Blue, and Yellow - except for wild cards, which have no specific color. A legal play essentially involves matching the color, number, or word of the previously played card. UNO features: 2-4 player action