Play Zero21 online

About this game

Zero21 is a challenging game with a simple rule: Try to stay between 0 and 21. It's not easy! Zero21 Solitaire is a fun numbers game with solitaire flavor to relax and unwind while keeping your mind sharp. Collect all the number cards on the board while keeping your sum between 0 and 21. But be careful! Zero21 Solitaire is more difficult than you think.

How to play

On a computer, most games in this category use the arrow keys or WASD to move, the mouse to aim or select, and space or enter to confirm and act. On a phone or tablet, tap and swipe directly on the game area. If Zero21 uses its own control scheme, it will show you on the title screen or in its in-game help.

Use the Fullscreen button above the description to expand the game to the whole screen — worth doing on smaller displays, and it removes everything else from view so you can concentrate.

Tips for a better run

• Give the game a few seconds to finish loading before you start pressing keys — early input can be dropped.
• Close heavy background tabs if the frame rate feels sluggish; browser games share your machine's resources.
• On mobile, turn the device to landscape for games designed around a wide play area.
• Found a bug or a game that will not load? Use the Report button above and tell us what happened.

More like this

If you enjoyed Zero21, the full Puzzles games collection has plenty more in the same vein, and the games below are the ones other players moved on to next.