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Play Zero 21 Solitaire as a stand alone web app.

Zero 21 Virtual Playing Cards Solitaire Video Game

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This is a unique solitaire game with the goal of exhausting all cards in the deck while keeping the total face value between zero and 21 at all times.

  • Click on a card to lay it on the stack.
  • For cards with static values that value will be added to the stack total.
  • For cards with relative values (max, min, middle) the stack value will go to that level (20, 1 or 10 respectively).
  • Use the hold position as needed to keep working through the deck while staying in range.





Play Zero 21 Solitaire Game Online

Children and parents can play this unique solitaire card game by clicking in the window below.

Alternatively kids and adults can play this virtual card deck game for free as a web application here.

Zero 21 Card Game Play Instructions

How to Play

Lay all the cards from the playing field onto the waste pile while keeping the total value between 1 and 20 for the duration of the game.

  • Starting the Game
    • Click on the green play button on the game’s welcome screen.
      • If it is your first time playing the game this will start the first level.
      • If you have played the game before your level completion progress, unlocked decks, and gem total are stored in your local web browser.
    • The welcome screen has 2 buttons at the top and 1 at the bottom.
      • Top left: settings menu allows you to return home, control sound & reset your gameplay data.
      • Top right: developer information.
      • Bottom center cards: use your gems to unlock any of the 5 other different card backs & select which deck you would like to play.
  • Game Controls
    • Game goal
      • Your goal is to use up the entire card stack while ensuring your total never goes below 1 or above 20.
        • Each level has a unique stack configuration and order.
        • Any card laid atop other cards on the stack must be used or played before you can play other cards further down that stack.
      • Each card has either a static value on it, or a relative position.
        • Static value: the amount shown on the card (from -9 to +9) is added to the number shown on the main card stack.
        • Relative value: the stack is changed to the value of this card when it is laid.
          • Max shifts the deck value to 20.
          • Min shifts the deck value to 1.
          • Two arrows pointing to the center shifts the deck value to 10.
    • Placement options
      • You have 4 options with each card:
        • Use it right away by placing it directly on the pile. Clicking it with your mouse automatically does this.
        • Wait on it & ignore it while working on other parts of the stack.
        • Temporarily store the card in the hold stack to the right of the active waste card pile.
        • Spend 10 gems to discard the card.
          • Each level you beat pays you roughly 7 gems & unlocking other card deck designs costs 100 gems.
    • Level completion
      • When a level is complete click on “Tap to Continue” to start the next level.
      • Alternatively you can click the home button to go back to the game welcome screen or the card deck button to switch the design of the card backs or use gems to buy other card back designs.
  • Strategy
    • There are really 3 or 4 core strategies to this game.
    • Work on multiple stacks in parallel.
      • If you deplete one stack fully while ignoring another stack of cards then you lose the optionality of being able to pull from either stack as needed to keep the numbers in range. By having 2 or more stacks remaining it allows you to pull from a second or third option if one particular row is not working well for you.
      • If a card has a relatively low absolute value and is the last card on a stack it can make sense to leave it for its optionality while working on other parallel stacks.
    • Keep close to 10.
      • By keeping your total close to 10 it enables you flexibility by allowing you to play almost any card and stay in range.
      • Sometimes you have to consider which order you would want to lay cards in to keep the numbers near the middle. For example, if you had a value of 10 & had 2 available cards of “min” and “+9” you could first lay the min, taking your value down to 1, and then lay the +9 and you are right back at 10.
      • If it feels the deck is skewing high sometimes it makes sense to add up to 18, 19 or 20, then use the max card. Similarly, if it feels the deck is skewing low it can make sense to get the value down to 1, 2 or 3 before using the min card.
    • Use the hold position regularly
      • If you are close to 20 and have a large positive card you may need to put that large positive card in the hold position.
      • If you are close to zero and have a large negative card you may need to put that large negative card in the hold position.
      • If you have a card in hold & no longer need to leave it there then open that space up for future cards in the deck.
      • If things are going well, it may make sense to put a middle card in the hold position to save it for later and use it when needed. It is the singular best card in the deck as it guarantees you can make another play no matter what card is next.
    • If you are stuck you can click on the settings menu button in the upper left corner and press home to go back to the welcome screen & start the current level again from the beginning.
      • The alternative is to spend 10 gems throwing a card away, but I would typically rather play the level again than do that. 🙂

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Zero 21 Virtual Playing Cards Solitaire Video Game
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Zero 21 Card Game Screenshot

Zero 21 Solitaire Welcome Screen Screenshot.
Zero 21 Solitaire Game Screenshot.
Zero 21 Solitaire Hold Position Used Screenshot.
Zero 21 Solitaire Level Beat Screenshot.
Zero 21 Solitaire Card Deck Design Upgrade Screenshot.

Mobile Friendly Cross Browser Support

This game is rendered in mobile-friendly HTML5, so it offers cross-device gameplay. You can play it on mobile devices like Apple iPhones, Google Android powered cell phones from manufactures like Samsung, tablets like the iPad or Kindle Fire, laptops, and Windows-powered desktop computers. All game files are stored locally in your web browser cache. This game works in Apple Safari, Google Chrome, Microsoft Edge, Mozilla Firefox, Opera and other modern web browsers.

Where To? What Next?

This game was published in these categories: Solitaire. You can visit any of them to select other fun games to play.

Our site hosts thousands of free online games. Check out the newest additions to our library or play a random game!

This game was published using our teamwide account. If you have any comments, questions, concerns, or others (are there others even???) you can use the comments below to send along your 2 cents and help us improve the site further :) Your 2 cents plus 3 cents will buy you a nickel, but if your comments are genuinely useful and/or helpful and/or funny and/or memorable in a good way, we will probably say thanks :D

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One comment on "Zero 21 Virtual Playing Cards Solitaire Video Game"

  • Joey says:

    The goal of this game is to clear out all the cards without going below either of the titular numbers. Each new card adds or subtracts from your starting value. You also have a chance to save at least one card for future use. Make sure that you remove the cards in the right order. Messing up the order and you risk a game over.

    This game keep your mind engaged on a boring afternoon. It can be difficult to clear out the entire stack without careful decision-making. Cards taken at the wrong order may render the game unwinnable. This game will test your math skills and strategic thinking at the same time.

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