I bought Uno Attack when it first came out. We played it a lot too because it is a really fun game, a lot more entertaining than the original card game. It is basically the same rules as the original except when you don't have a card to play (you don't have a matching number or color) then you have to hit the Uno attack button and the machine will shoot out a random number of cards at you. You may have to hit this button several times in order to get a card to play. I think it shoots out like one to eight cards. This part of the game makes if really fun for everyone of all ages. The only thing disappointing was that after playing a lot for awhile, cards would get stuck in the machine and the roller that helps spits out the cards kind of messed up somehow because the cards just aren't shooting out right. They either don't shoot anything out when you hit the button or they shoot out like six or seven at one time like they are stuck together. I don't know if this is fixed in the newer games that are being sold or if there is a way to fix my problem (maybe I'll look it up on their web site), but it's still a fun game.