This is an addictive card game that you can play here on CrazyGames directly in your browser, for free. It has received 847 plays and has been rated 6.7 / 10 by 9 people. This highly addictive puzzle game is powered by HTML5 to work without trouble in most browsers. One of the many advantages about playing Crossover 21 here is that it is available in full-screen. If you like Crossover 21, make sure to check out our other card games or Poker World and Solitaire Social.