What is TETR.IO?
TETR.IO is a modern online stacker in the same genre as Tetris, created by a developer known as osk with a small team. It runs in the browser and is one of the most popular places to play competitive block stacking online.
You can jump into Quick Play against lots of players at once, climb the ranked Tetra League in one on one matches, or set personal bests in solo modes such as 40 Lines and Blitz. Custom rooms let you play with friends using your own rules, and the controls and handling are highly adjustable for serious players.
Main Features
- Quick Play against many players at once
- Ranked Tetra League one on one matches
- Solo modes like 40 Lines and Blitz
- Custom rooms to play with friends
- Detailed control and handling settings
- Global leaderboards and player profiles
How to Get Started with TETR.IO
- Go to tetr.io in your browser.
- Play as a guest or create a free account to save your progress.
- Try 40 Lines or Blitz to learn the controls.
- Join Quick Play or Tetra League to play against others.
TETR.IO Pricing
TETR.IO is free to win and free to play with ads. An optional Supporter subscription removes ads and adds cosmetic perks, and it does not affect gameplay.
Who Should Use It?
- Tetris fans who want online multiplayer
- Competitive players chasing ranks
- Casual players looking for a quick game
- Friends who want a custom battle room
- Speedrunners improving their times
TETR.IO Alternatives
- Lichess: free online chess
- RetroGames: classic games in the browser
- Skribbl.io: multiplayer drawing game
Frequently Asked Questions
Is TETR.IO free?
Yes. TETR.IO is free to play. An optional Supporter plan removes ads and adds cosmetic perks only.
Do I need an account to play TETR.IO?
You can play as a guest, but a free account saves your stats and is needed for ranked play.
Is TETR.IO official Tetris?
No. It is an independent game in the same genre as Tetris.