UNO!

Uno! (/ˈuːnoʊ/; from Italian and Spanish for 'one'; stylized as UNO) is an American shedding-type card game that is played with a specially printed deck. The game's general principles put it into the Crazy Eights family of card games.

Uno with slapping, sliding and blank cards

Solitaire Uno

Magic UNo

■ play a card matching the discard in color, number, or symbol

■ play a Wild card, or a playable Wild Draw Four card (see restriction below)

■ draw the top card of the deck

■ A player who draws from the deck must either play or keep that card and may play no other card from their hand on that turn.

■ A player may play a Wild card at any time, even if that player has other playable cards.

■ A player may play a Wild Draw Four card only if that player has no cards matching the current color. The player may have cards of a different color matching the current number or symbol or a Wild card and still play the Wild Draw Four card.

■ A player who plays a Wild Draw Four may be challenged by the next player in sequence (see Penalties) to prove that their hand meets this condition.

■ If the entire deck is used during play, the top discard is set aside and the rest of the pile is shuffled to create a new deck. Play then proceeds normally.

■ It is illegal to trade cards of any sort with another player.