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.

Desktop/Android/HTML5/iOS Java game development framework

Cocos2d-x is a suite of open-source, cross-platform, game-development tools utilized by millions of developers across the globe. Its core has evolved to serve as the foundation for Cocos Creator 1.x & 2.x.

rhythm is just a *click* away!

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

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

🕹 Retro video game emulation for macOS

Cross-platform, graphics API agnostic, "Bring Your Own Engine/Framework" style rendering library.

Open Source real-time strategy game engine for early Westwood games such as Command & Conquer: Red Alert written in C# using SDL and OpenGL. Runs on Windows, Linux, *BSD and Mac OS X.

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

An open source re-implementation of RollerCoaster Tycoon 2 🎢

Clone of the Age of Empires II engine 🚀

One framework for creating powerful cross-platform games.

Luanti (formerly Minetest) is an open source voxel game-creation platform with easy modding and game creation

The source code for 2048

Cataclysm - Dark Days Ahead. A turn-based survival game set in a post-apocalyptic world.

Flexible level editor

Simple and Fast Multimedia Library

A simple Minecraft clone written in C using modern OpenGL (shaders).

DEPRECATED - A HTML5/JavaScript multiplayer game experiment

JavaScript Performance Monitor

OpenTTD is an open source simulation game based upon Transport Tycoon Deluxe

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.

[mirror of https://gitlab.com/veloren/veloren] An open world, open source voxel RPG inspired by Dwarf Fortress and Cube World. This repository is a mirror. Please submit all PRs and issues on our GitLab page.

Space exploration, trading, and combat game.

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

A running-jumping-swordfighting game I made on the Apple II from 1985-89

The Ren'Py Visual Novel Engine

OpenMW is an open-source open-world RPG game engine that supports playing Morrowind. Main repo and issue tracker can be found here: https://gitlab.com/OpenMW/openmw/

Shattered Pixel Dungeon is an open-source traditional roguelike dungeon crawler with randomized levels and enemies, and hundreds of items to collect and use. It's based on the source code of Pixel Dungeon, by Watabou.

a modern & lightweight HTML5 game engine

Simple Minecraft-inspired program using Python and Pyglet

The code base of SuperTuxKart

Written in C++ and using SDL, The Powder Toy is a desktop version of the classic 'falling sand' physics sandbox, it simulates air pressure and velocity as well as heat.

Classic Tomb Raider open-source engine

Turbulenz is a modular 3D and 2D game framework for making HTML5 powered games for browsers, desktops and mobile devices.

Open-source, cross-platform, C++ game engine for creating 2D/3D games.

Game engine

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

Doom 3 GPL source release

Direct port of the Bullet physics engine to JavaScript using Emscripten

Open source clone of Theme Hospital

A complete 3-D game development suite written in Java.

Main game repository for Beyond All Reason.

Cocos2d for iOS and OS X, built using Objective-C

A powerful free cross-platform RTS game engine. - Report issues at https://springrts.com/mantis/