Each card type in Uno Attack grants a special ability to the player who uses it. The game has seven unique card types: Discard All, Hit 2, Skip, Reverse, Trade Hands, Wild All Hit and Wild Hit Fire.
The Reverse card simply changes the direction of play. The current player still plays a turn, but the next play will be in the opposite direction and play will continue in that direction.
The Skip card causes the next player to lose a turn.
The Discard All card allows the current player to discard all cards in their hand of the color currently on top of the discard pile. They can also be played against other Discard All card colors.
If a Hit 2 card is played, the next player must press the launcher button two times. They then add any cards that are launched to their deck and forfeit that turn.
The Trade Hands card allows the current player to exchange an entire hand with another player.
The Wild Hit-Fire card allows the person who plays it to name its color. The next player must then press the launcher button until it distributes cards and add the cards to that hand. They also forfeit a turn.
The Wild All-Hit card also allows the person who plays it to name the color. Every other player must press the launcher button in turn once and add any cards it distributes to that hand.