Uno is an American card game which is played with a specially printed deck. The game was originally developed in 1971 by Merle Robbins in Reading, Ohio, a suburb of Cincinnati. It has been a Mattel product since 1992. The game's general principles put it into the Crazy Eights family of card games. The deck consists of 108 cards, of which there are 19 of each color (red, green, blue, and yellow), each color having two of each rank except zero. The ranks in each color are 0 through 9, 'Skip', 'Draw Two' and 'Reverse'. In the New UNO, there are Skip cards, Reverse cards, Draw Two cards and more. The remaining eight cards are 'Wild' and 'Wild Draw Four', the deck having four of each. Before playing, a dealer must be selected by drawing lots or by some other method. The Dealer shall deal seven cards to each player in rounds.
Contributions by Nanami Kamimura, PrometheusX303, and Kurisutaru.