This is Prism Blast Online — our free, original take on the Block Blast block-puzzle format. It runs entirely in your browser, so there is nothing to install, no account to create and no paywall. Drag a block onto the 8×8 grid, fill a full row or column to clear it, and chain clears together for combo bonuses.
How to play
- Drag any of the three blocks from the tray onto the board. A blue highlight means it fits; a red highlight means it does not.
- Clear a line by filling all 8 cells of a row or column. Cleared cells give you points and free space.
- Combo by clearing lines on back-to-back placements, or clearing two or more lines with a single block.
- The game ends only when none of your three blocks can be placed anywhere.
New here? Read the full how to play Block Blast guide, then level up with our tips and tricks and high-score strategy.
Why play the browser version?
- No download — instant load on any device.
- Unblocked — one self-contained page, so it works where game portals are blocked.
- No ads on the board and no pop-ups mid-game.
- Saves your best score locally in your browser.
- Touch-friendly — blocks lift above your fingertip so you can see the target.
Want 500 levels, Time Rush, daily challenges and offline play? Get the free Prism Blast app for Android.