XO game (you know it! ) Super simple—jump right in and play. Jam packed with 200 colourful themes and you can get more: try Chalk Themes (dusty but good-looking), Holo Themes (retro, circa 2011) and Calculator themes (it's a number fight: -). Colours change while you play, always a new look, always FUN! XO has 2-player games and immersive mode.