Play Block 21 Unblocked
Block 21 unblocked, free, in your browser. No downloads, no installs, no login required. Works on any school Chromebook, library computer, or work machine.
Free instant play
Play free with no ads, no download, and no account required.
Actually unblocked
Hosted on shadowbot.tech which most school filters allow. No proxy needed.
Instant play
Loads in seconds. No account, no email, no captcha.
Anywhere it works
Works on Chromebook, Windows, Mac, iPad, phone. Any modern browser.
About Block 21
Tap/click on a group of three or more blocks with the same color. Get block 21. Have fun!
Category: Puzzle · Also see: Block 21 main page
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