Mattel also launched Uno Show ’Em No Mercy, a version designed that features what gamemakers call ruthless rules and penalties. It was the second-best-selling card game in the U.S. last year ...

Uno is a deceptively simple card game. On the surface, it's all about matching colors and numbers. The first one to get rid ...

To be eligible for the contest, fans must create a video using the UNO Reverse Card filter and tag their videos with #UNOSocialClub and #MattelContest. The contest runs from today through June 19.

When the referee obliged, Fosh whipped out a green Uno Reverse card. The stunt helped supercharge a movement to use the card—which in the game reverses the order of play—as a real-life ...