Multiplayer Framework for Node.js.

Usage no npm install needed!

<script type="module">
  import colyseusCore from 'https://cdn.skypack.dev/@colyseus/core';


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Multiplayer Framework for Node.js.
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Colyseus is an Authoritative Multiplayer Framework for Node.js, with clients available for the Web, Unity3d, Defold, Haxe, and Cocos2d-X. (See official clients)

The project focuses on providing synchronizable data structures for realtime and turn-based games, matchmaking, and ease of usage both on the server-side and client-side.

The mission of the framework is to be a standard netcode & matchmaking solution for any kind of project you can think of!

You're encouraged to take a look on some games being developed with it and make your own!

⭐ī¸ Enjoying Colyseus? Show your support by starring the project on GitHub ⭐ī¸

What Colyseus provides to you:

  • WebSocket-based communication
  • Simple API in the server-side and client-side.
  • Automatic state synchronization between server and client.
  • Matchmaking clients into game sessions
  • Scale vertically or horizontally

What Colyseus won't provide:

  • Game Engine: Colyseus is agnostic of the engine you're using. Need Physics? Add your own logic / package.
  • Database: It's up to you to configure and select which database you'd like to use.

See roadmap for our future plans.

🚀 Quickstart

Create a bare-bones Colyseus server by using npm init colyseus-app.

npm init colyseus-app my-colyseus-server
cd my-colyseus-server
npm start

🕹ī¸ Official Client Integration

🛠ī¸ Tools

Tools made by the community ❤ī¸

Usage examples

See the official examples for usage reference with the latest version of Colyseus.


Thanks goes to these wonderful people (emoji key):

Endel Dreyer

đŸ’ģ 📖 💡

Fazri Zubair

đŸ’Ŧ đŸ’ģ 🤔 đŸ’ŧ

Kyle J. Kemp

đŸ’Ŧ 🐛 đŸ’ģ 🤔

James Jacoby

đŸ’Ŧ 💡 🖋

Aymeric Chauvin

đŸ’Ŧ 💡

Jonas Voland

đŸ’Ŧ 🐛 đŸ’ģ 🤔 💡

Dr. Burton


Tommy Leung


Damian A. Pastorini

đŸ’Ŧ 📖 🐛

Luke Wood

đŸ’Ŧ 🐛 đŸ’ģ

Milad Doorbash

🐛 đŸ’ģ


🐛 đŸ’ģ

Darek Greenly

đŸ’Ŧ 🐛 đŸ’ģ

Nikita Borisov

🐛 đŸ’ģ đŸ’ŧ 🤔

Phil Harvey


Brian Hay







đŸ’Ŧ 🐛 🤔


🐛 đŸ’ģ

This project follows the all-contributors specification. Contributions of any kind are welcome!


We encourage you to contribute to Colyseus! Please check out the Contributing guide for guidelines about how to proceed. Join us!

Everyone interacting in Colyseus and its sub-projects' codebases, issue trackers and chat rooms is expected to follow the code of conduct.

Backers / Supporters via Patreon

As of February 2021, Colyseus is owned and sponsored by Lucid Sight. A warm thank you for previous supporters of the project is forever documented in the early supporters wiki page.