21 Blitz combines elements of the Solitaire and blackjack, or 21, card games. You want to get rid of your deck of cards as quickly as possible by forming different piles, but you can only clear a pile if you reach 21 or use a wild card (a blackjack). As you clear piles, you earn points. You can earn more points for clearing bigger piles and clearing your deck before the time runs out. You’re typically matched up against other players and the highest score wins.