UNO x ONLY | © 2026 Mattel. In a world going crazy playing mobile games, there’s something to be said about sitting together and playing a game of UNO, which continues to have the upper hand! At the heart of UNO lies togetherness achieved through the universal language of play, and because of this, it continues to thrive  - it’s no surprise that UNO is the # 1 game property in the world. So when it comes to UNO, which we represent as a part of the Mattel portfolio, we did w