Uno is a card game played with a specially printed deck consisting of 110 cards including red, blue, green, yellow cards with numbers and special cards like reverse and skip. The game was created in 1971 and involves players being dealt 7-10 cards with the goal of getting rid of cards in their hand by playing cards that match the color or number of the discard pile. Players must draw a card if they cannot play or shout "Uno" when they have one card left to win.