In which country was the card game UNO invented?

Uno (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.

The game was originally developed in 1971 by Merle Robbins in Reading, Ohio, a suburb of Cincinnati. When his family and friends began to play more and more, he spent $8,000 to have 5,000 copies of the game made. He sold it from his barbershop at first, and local businesses began to sell it as well. Robbins later sold the rights to UNO to a group of friends headed by Robert Tezak, a funeral parlor owner in Joliet, Illinois, for $50,000 plus royalties of 10 cents per game. Tezak formed International Games, Inc., to market UNO, with offices behind his funeral parlor.

Basic UNO rules:

Players take turns matching a card in their hand with the current card shown on top of the deck either by color or number. Special action cards deliver game-changing moments as they help you defeat your opponents. These include Skips, Reverses, Draw Twos, Wild and Draw Four Wild cards. There are 25 of each color (red, green, blue, and yellow), eight Wild cards, three Customizable cards and one Special Rule card inside the 112-card deck. If you can’t make a match, you must draw from the central pile. And when you’re down to one card, you must shout “UNO!” The first player to rid themselves of all the cards in their hand before their opponents, wins the game.