UNO is a card game played with a deck of numbered cards in red, blue, green and yellow. Use all your cards and call "UNO" when you have one left.

Appropriately titled Uno: Show ‘Em No Mercy, this takes the classic game and dials it up to one hundred with new cards and rules. The new cards are a Wild Reverse Draw 4, which allows players to ...

By some measures Uno is the top-selling card or board game in the world. It’s seemingly showing up everywhere – thanks in part to dozens of new editions published by maker Mattel each year.