Solitaire 0-21 is a unique solitaire game where instead of using a standard deck of cards, the cards have positive and negative values such as +3 or -5. The the goal is to clear all of the cards from the board while keeping your stack between 0 and 21. Special cards such as Min, Mid and Max will help you along the way. Collect gems to spend in the shop and customize your game. Cards can also be dragged to the hold if you don't want to the card right away. Dragging a card to the trash will eliminate the card, however will cost you gems to do so. Ready to play? Play through all 75 levels or try out the daily challenge!