The object of the game is to get rid of all your cards. The UNO command cards direct the game by telling players when to trade hands, discard, reverse the playing order, or skip a player. Beware the dreaded Hit command, though, as this translates into a game of Russian roulette. You never know when the card launcher is going to fire off a stream of UNO cards just for you! For 2 to 10 players.