UNO AND UNO is a card game that is similar to the classic game of Crazy Eights. It is played with two decks of cards, and each player is dealt seven cards. The goal of the game is to be the first player to get rid of all their cards. Players can discard cards that match the suit or rank of the top card on the discard pile. The first player to discard all their cards wins the game. DOS is the Spanish word for two, which is the number of decks used in the game.