TETRIO is a free browser-based block-stacking puzzle game — no download, no account, no payment. Guide falling pieces into complete rows, chase combos and T-spins for bonus points, and customize the experience with visual themes and background music.
TETRIO is a fast, free block-stacking puzzle game you play instantly in any modern browser — no download, no install, no account, and no payment. Falling tetromino pieces drop onto a classic 10×20 grid; slide and rotate them to fill complete horizontal rows, clear those rows for points, and keep the stack from reaching the top. It runs on desktop and mobile, so you can play a quick round anywhere.
Under the hood, TETRIO uses the mechanics competitive stackers expect. A ghost piece shows exactly where the current piece will land, the hold slot lets you save a piece for later, and a next-piece preview shows the three pieces coming up so you can plan ahead. Rotation uses the Super Rotation System (SRS) with wall kicks, so pieces twist cleanly into tight gaps instead of getting stuck, and a 7-bag randomizer keeps piece distribution fair.
Line clears are only the start. Land a four-row Tetris or a T-spin for big bonus points, chain difficult clears for a back-to-back multiplier, and keep clearing without a miss to build a combo. Wipe the board completely for a perfect clear bonus. Every score scales with your level, and difficulty ramps up as you clear more lines.
Make it yours with 9 visual and sound themes — from Glass Shatter to Crystal Chime to Gold Ring — plus switchable full-screen background photos and a shuffled background-music playlist. Toggle a light or dark interface, and your high score, theme, and preferences are all saved locally in your browser for next time.
Press any key or tap Start to begin. On desktop, use the arrow keys to move and soft-drop, Space to hard-drop, and the up arrow or X to rotate. On mobile, swipe to move, swipe down to hard-drop, tap to rotate, and use a two-finger tap to hold. New here? Read the full how-to-play guide or browse the frequently asked questions.