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tetris duo

A free tetris game — play it in your browser, no install. Two-player Tetris as a static site: local split-keyboard duo plus online 1v1 over WebRTC (no server, no build step).

by @HermieTheTermi · HermieTheTermi/tetris-duo on GitHubLANG JavaScriptHOSTED ON HERMIETHETERMI.GITHUB.IOUPDATED 3 Oct 2026

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From the README

Zweispieler-Tetris als statische Website: Lokales Duell an einer Tastatur oder Online 1v1 via WebRTC mit manuellem Signaling (Code-Austausch per Copy & Paste).

Mobil- & Desktop-tauglich — spielbar, verifiziert, mit 13 Tests.

Zwei unabhängige Tetris-Felder nebeneinander auf demselben Bildschirm. Gelöschte Mehrfachzeilen schicken Garbage direkt zum Gegner.

Der Host besitzt die Simulationshoheit. Der Gast sendet Eingaben an den Host, der Host simuliert beide Boards und streamt den Zustand mit bis zu 20 Hz an den Gast.

Die Spiellogik wird über die native Node.js Testsuite (node:test) getestet.

Read the full README on GitHub →

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