Stack blocks and be the first player to get rid of all your cards, or win the game anytime by succesfully playing the 9th block on the stack.
In Block Out! each player gets 7 cards. Each turn a player has to play a card. If the player cannot play a card, the he/she draws cards until a card comes up that can be played.
Playing a block card: Choose a block that isn't on the stack already and which matches the card. Attempt to place it on the stack. You can only use one hand, and the stack had to stay in place for at least 3 seconds.
Playing an action card: There are two kinds of action cards. Pass your turn and reverse play order.