Solitaire Zero 21 is a free arcade game you can play right here in your browser. Think math and card — that is the shape of it. Everything runs client-side, so it starts fast even on a modest connection.
About Solitaire Zero 21
Fun numbers game with solitaire flavor to relax and unwind while keeping your mind sharp. Collect all the number cards on the board and progress through 75 unique levels.
How to play Solitaire Zero 21
There is very little to learn before your first run. Load the game above and it fills the player in portrait. On a phone you can play one-handed; on desktop the frame stays centred so nothing is cropped. Most players get the hang of it inside two or three attempts.
Controls
| Input | Action |
|---|---|
| Mouse | Pick up and place cards |
| Double click | Auto-move a card to the foundation |
On mobile: Tap and swipe directly on the screen. The game is built for portrait, so you can play one-handed without rotating your phone.
Why it is worth playing
Solitaire Zero 21 does one thing and does it properly. There is no bloat around the edges, which is exactly what you want from a browser game.
At a glance
- Free to play with no account required
- Runs in the browser — nothing to download or install
- Portrait layout, comfortable one-handed on mobile
- Keyboard and mouse on desktop, full touch support on mobile.
- Math gameplay — Mental arithmetic that does not feel like homework
- Card gameplay — Card games, shuffled and dealt
- Added to our catalogue from a 2020 release
Frequently asked questions
Is Solitaire Zero 21 free to play?
Yes. Solitaire Zero 21 is completely free and runs in your browser. There is no purchase, no subscription and no account needed — open the page and play.
Do I need to download or install anything?
No. Solitaire Zero 21 is an HTML5 game that runs inside the page itself. There is nothing to install, no plugin and no launcher — it loads like any other web page.
Can I play Solitaire Zero 21 on my phone?
Yes. Tap and swipe directly on the screen. The game is built for portrait, so you can play one-handed without rotating your phone.
What are the controls for Solitaire Zero 21?
Keyboard and mouse on desktop, full touch support on mobile. Mouse — pick up and place cards; Double click — auto-move a card to the foundation.
Can I play Solitaire Zero 21 fullscreen?
Yes. Use the fullscreen button in the top-right of the game player to expand it to the whole screen, and press Escape to come back out.
What kind of game is Solitaire Zero 21?
Solitaire Zero 21 is a arcade game built around math and card. If that is the sort of thing you enjoy, the related games further down the page are picked using the same tags.
