Awesome Open Source Games

Godot Engine – Multi-platform 2D and 3D game engine

JavaScript 3D Library.

The HTML5 Creation Engine: Create beautiful digital content with the fastest, most flexible 2D WebGL renderer.

Phaser is a fun, free and fast 2D game framework for making HTML5 games for desktop and mobile web browsers, supporting Canvas and WebGL rendering.

Babylon.js is a powerful, beautiful, simple, and open game and rendering engine packed into a friendly JavaScript framework.

♞ lichess.org: the forever free, adless and open source chess server ♞

a 2D rigid body physics engine for the web ▲● ■

Powerful web graphics runtime built on WebGL, WebGPU, WebXR and glTF

An open source re-implementation of RollerCoaster Tycoon 2 🎢

Flexible level editor

DEPRECATED - A HTML5/JavaScript multiplayer game experiment

JavaScript Performance Monitor

The Easel Javascript library provides a full, hierarchical display list, a core interaction model, and helper classes to make working with the HTML5 Canvas element much easier.

An open source, turn-based strategy game with a high fantasy theme.

a modern & lightweight HTML5 game engine

A meta-JavaScript adventure game by Alex Nisnevich and Greg Shuflin.

Direct port of the Bullet physics engine to JavaScript using Emscripten

A modular, extendable, and easy-to-use physics engine for javascript

JavaScript Game Engine

The Atomic Game Engine is a multi-platform 2D and 3D engine with a consistent API in C++, C#, JavaScript, and TypeScript

Lightweight 3d physics engine for javascript

🎮 The best way to play your itch.io games

2D HTML5 rendering and layout engine for game development

Freeciv-web is an Open Source strategy game implemented in HTML5 and WebGL, which can be played online against other players, or in single player mode against AI opponents.

A puzzle game inspired by functional programming

A game of lonely space adventure

The Turn Based Strategy Game/eSport. Master your beasts! 🐺

3d city builder game

:bird: :video_game: A MelonJS port of the famous Flappy Bird Game

a node.js plugin to integrate nw.js/electron games with steamworks

Kiwi.js is a blazingly fast mobile & desktop browser based HTML5 game framework. It uses CocoonJS for publishing to the AppStore.

⬤▗▚▚▚ Web-based online rhythm action game. Based on HTML5 technologies, React, Redux and Pixi.js.

Digital Estate Planning: The Game

HTML5 Tetris Game for jQuery

Stendhal is a fun friendly and free multiplayer online adventure game with an old school feel.

AI-powered Werewolf (Mafia) social deduction game where every player is controlled by top LLMs like DeepSeek, Qwen, Gemini, and more

DuckHunt ported to JS and HTML5

:ski: The classic PC Game SkiFree, but in JS.

A collection of JS engine implementations of Breakout

The MMORPG Meridian 59

GameJs is a thin library on top of the HTML canvas element. In addition to the drawing functions it has a set of generally helpful modules for game development.

Trigger Rally Online Edition - fast arcade rally racing

:notes: Competitive, multiplayer, realtime, guess the song game

🔴🔵 Connect Four game in JS + Canvas

Transcube - A Blocky Puzzle Platformer

A "proof-of-concept" remake of the famous XPilot game, this time in a web browser near you

I have created 111 one-button games in 2021

a dungeon crawler written in TypeScript using React and svg

Open Source Php/NodeJs Online RPG and Trading Game Engine

:video_game: a Unity3D local multiplayer game made for MLH LocalHackDay