Free HTML5 browser game

Block 21

Tap/click on a group of three or more blocks with the same color. Get block 21. Have fun! Block 21 is cataloged by Slacking Games as a Block Puzzle Games title supplied by GameMonetize. Its source metadata highlights Puzzle, Block, Brain. The player is presented in a landscape-friendly frame. This page keeps the playable source, provider facts, category path, available control notes and related games together so players can compare it with similar titles.

Catalog overview prepared by Slacking Games from the provider record and verified directory facts.

Loading Block 21…

The game and in-game advertising are delivered by GameMonetize. If the player does not start, refresh this page or try a current Chrome, Safari, Firefox or Edge browser.

Current source controls: Tap the screen or click the mouse

Quick facts

Game details

Channel: Puzzle Games
Subcategory: Block Puzzle Games
Provider: GameMonetize
Platform: Web Browser
Orientation: landscape
Updated: July 21, 2026

Optional third-party video

Game walkthrough

The walkthrough player is supplied by GameMonetize and may contain advertising. It loads only after you choose to open it.

About Block 21

Slacking Games assembled this catalog overview from the named provider record, taxonomy and player configuration. It does not claim an independent editorial review.