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Play TETR.IO on tetr.io
Mashup MultiplayerAdded 5 hours ago
TETR.IO
Online Tetris clone with battles and solo modes
Opens the creator's site in a new tab. Foundplay doesn't host games. Link checked working 1 hour ago. How we check links.
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At a glance
TETR.IO is a free multiplayer puzzle and arcade game that plays in your browser on tetr.io. On Foundplay since October 11, 2026.
- Is TETR.IO free to play?
- Yes. TETR.IO is free and plays in your browser on tetr.io. Foundplay links to it but doesn't host it.
- Do I need to download TETR.IO?
- No. It runs in a browser tab, with nothing to install.
- Is TETR.IO safe?
- Foundplay checks its link every few hours and gives it a daily safety check (malware blocklists, downloads, crypto miners, parked domains and fake virus warnings), and hides the game at once if that check fails. No check can promise a site is safe: if a game asks you to download something or for a password, leave it.
Featured in .io games in your browser: Slither.io, Agar.io and Krunker, Classic browser games you can still play: Wordle, 2048, QWOP and more
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