What is С21A?
С21A is a free puzzle game with casual, animal and cat elements that you can play online in your web browser on Gameziko. It needs no download, no install and no account. The endless card game "C21A" is an exciting combination of classic blackjack and addictive strategy.
How to play С21A
- Press "Play now" on the game screen. С21A loads inside the player; some games take up to 20 seconds and may show a short ad first.
- Click on one of the holders to place a card in it.
- Cards have the following price values: Cards with a number: the price is the number on the card.
- Picture cards: the price of all is 10.
- Ace: 1 or 11.
- Usually counts as 11, but if this counts the sum of the points in your hand as more than 21, the ace counts as 1.
- Collecting 21, 5 cards in the holder or putting a joker in it will reset the stack and you will be awarded points.
- Use the full-screen button at the bottom right of the player for a bigger view, and press Esc to leave full screen.
Game details
| Category | Puzzle |
|---|---|
| Tags | Casual, animal, cat |
| Controls | Mouse |
| Screen | Landscape (800 × 600) |
| Price | Free |
| Download or sign-up | Not needed |
| Distributed by | GameDistribution |
| Added to Gameziko | 30 September 2026 |
Description from the developer
The endless card game "C21A" is an exciting combination of classic blackjack and addictive strategy. In this game, your goal is to collect cards to score 21 points. But be careful not to overdo it or you will lose! The game offers endless opportunities to develop and improve your skills. The game "C21A" is a great way to pass your time and test your skills in card games.
С21A: frequently asked questions
Is С21A free to play?
Yes. С21A is free to play on Gameziko, with no download and no account needed. Like most free web games, it is funded by ads, so it may show a short ad before or between rounds.
What are the controls in С21A?
The developer's instructions for С21A say: "Click on one of the holders to place a card in it. Cards have the following price values: Cards with a number: the price is the number on the card. Picture cards: the price of all is 10. Ace: 1 or 11. Usually counts as 11, but if this counts the sum of the points in your hand as more than 21, the…"
Can I play С21A on a phone or tablet?
С21A is an HTML5 game, so it opens in modern mobile browsers as well as on a computer. Its controls were designed mainly for a mouse, so a computer usually gives the smoothest experience.
What games are similar to С21A?
If you like С21A, try Cat Sorter Puzzle, Animal Klotski and Coin Merge Machine. They are puzzle games with similar themes, and you can find more in the Puzzle category on Gameziko.
Good to know
С21A is made by an independent developer and delivered by GameDistribution, so Gameziko cannot change the game or recover lost progress. Any progress the game saves is kept in your browser on this device. If the game does not start, wait up to 20 seconds, allow ads for gameziko.com and try again, or report the game.