Gameziko
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Block 21

Puzzle
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What is Block 21?

Block 21 is a free puzzle game with block, brain and html5 elements that you can play online in your web browser on Gameziko. It needs no download, no install and no account. Tap/click on a group of three or more blocks with the same color.

How to play Block 21

  1. Press "Play now" on the game screen. Block 21 loads inside the player; some games take up to 20 seconds and may show a short ad first.
  2. Tap the screen or click the mouse
  3. 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

CategoryPuzzle
TagsBlock, Brain, HTML5
ControlsMouse, Touch (tap or swipe)
ScreenLandscape (1280 × 720)
PriceFree
Download or sign-upNot needed
Distributed byGameMonetize
Added to Gameziko30 September 2026

Description from the developer

Tap/click on a group of three or more blocks with the same color. Get block 21. Have fun!

Block 21: frequently asked questions

Is Block 21 free to play?

Yes. Block 21 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 Block 21?

The developer's instructions for Block 21 say: "Tap the screen or click the mouse"

Can I play Block 21 on a phone or tablet?

Yes. Block 21 supports touch controls, so it works in the browser on Android phones, iPhones and tablets as well as on a computer.

What games are similar to Block 21?

If you like Block 21, try Ants Clear All : Color Block Puzzle, Unbolck me and Blocks of Puzzle. They are puzzle games with similar themes, and you can find more in the Puzzle category on Gameziko.

Good to know

Block 21 is made by an independent developer and delivered by GameMonetize, 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.

PuzzleBlockBrainHTML5LogicPuzzle