In Crossover 21 you have to make sure you get the magic number 21 if you add the cards horizontally and vertically together. This game that looks like a combination of Solitaire, Scrabble and Sudoku is a nice fresh look at card games.
Because Crossover 21 has given this game a new look, it has become a modern game to play. You can choose from 3 power ups:
- The cross, with this you can play away a cross in the game
- The joker, this card counts for all values.
- The hammer, you play away a card.