This is an expansion for UNO: The Card Game. You will need the base game to play.

Add these special cards to a classic UNO deck (sold separately, subject to availability) and the fun begins! Each of the 16 cards in the Stack Pacl acts like a Draw Card that players can stack to make other players draw more and more cards. Play a Stack 1, Stack 2, or the dreaded Wild Stack Number card and soon players will be passing out penalties like popcorn. 

• Add UNO Add-On Packs to a classic deck of UNO cards to shake up the game; note: Classic UNO card game required!
• The Stack Pack includes 16 cards that builds fun with exciting twists!
• A Stack 1 Card makes the next player draw 1 card and lose their turn, a Stack 2 makes the next player draw 2 cards and lose their turn.
• Players may play a Stack card on another Stack card (or other Draw Card) if the color matches, increasing the number of cards the next player must draw.
• A Wild Stack Number card makes the next player draw a random number of cards. Flip the top card of the Draw Pile to find out how many!
• Each card has special graphic symbols to help identify the color of that card to allow players with ANY form of color blindness to easily play.
• Add-On symbols in the card background let players easily swap out packs to find the mix they like.