# TETR.IO: browser project guide

An online stacker with solo modes, multiplayer rooms and configurable inputs.

Collection: Browser discovery. Destination: Browser project. Device: Desktop recommended. Setup: Browser entry. Check: source / page only.

[Open browser project](https://tetr.io/)

![TETR.IO artwork](https://radiantoptimizergames.online/assets/tetrio.webp)

Project/creator-supplied social artwork; not a directory gameplay screenshot. Source: tetr.io.

## The project behind this entrance

TETR.IO’s official interface distinguishes Solo from Multiplayer. Solo options include 40 Lines, Blitz and Zen, while multiplayer offers ranked play and custom rooms.

## Starting and choosing your setup

Choose a mode, then review the current key bindings in Config before starting. Account and ranking requirements are controlled by the live service; this guide does not promise anonymous access to every mode.

The project offers a separate desktop client. The main link here remains the browser entrance. Network or update messages should be read before treating a matchmaking failure as low FPS.

## Why it is in this collection

This is an additional browser discovery selected to broaden the directory. It is not presented as a game shared by Radiant or as a title supported by the Windows optimizer.

## Questions and answers

### Must I install the desktop client?

The main entrance is the browser interface. TETR.IO also offers a separate desktop client.

### Was this checked in a completed play session?

No. This directory reviewed the project page or creator documentation. Loading a page does not verify a completed game, a multiplayer connection or device performance.

## Sources and review

Source review: 2026-10-10. Gameplay and performance are not tested by this directory.

- [Creator / project website](https://tetr.io/)