TETR.IO
Auto-checked Jul 8, 2026Unscored — replay pendingLoads in 0.1 s
Play TETR.IO →
Verification history
- First verified
- Jul 8, 2026
- Last verified
- Jul 8, 2026
- Check depth
- Auto-checked — an automated liveness check confirmed it loads and boots. We have not hand-replayed it recently.
- Current status
- ok
auto-check: HTTP 200 in 82ms, title "TETR.IO", screenshot captured 2026-07-09
Our take
osk's free browser-based stacker and the de facto home of competitive online block stacking: the ranked Tetra League, 40 Lines sprints, Blitz score attack and custom multiplayer rooms all run in the browser with modern guideline-style handling that players can tune in detail. Registration is free; ranked play and saved stats require an account. A downloadable desktop client exists but is optional.
In one line: Modern competitive stacker with ranked multiplayer, straight from the browser.
At a glance
Platforms:browser
Genres:puzzlestackermultiplayer
Tags:freeno-downloadmultiplayercompetitive
By Max Gamlet · checked as described in how we verify.