The 🎮 Open Source Game Development (OSGD) Collection is a curated list of freely available open-source game development resources that anyone can access. The purpose of the list is to serve as a central repository of open-source game development projects for anyone to discover, use, or contribute to.

Engines

Babylon.js

BabylonJS

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

⭐ 22450
🚩 85
TypeScript

o3de

o3de

Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D engine that enables developers and content creators to build AAA games, cinema-quality 3D worlds, and high-fidelity simulations without any fees or commercial obligations.

⭐ 7343
🚩 3590
C++

GDevelop

4ian

:video_game: Open-source, cross-platform game engine designed to be used by everyone.

⭐ 5713
🚩 477
JavaScript

renpy

renpy

The Ren'Py Visual Novel Engine

⭐ 4540
🚩 243
Ren'Py

love

love2d

LÖVE is an awesome 2D game framework for Lua.

⭐ 4346
🚩 96
C++

godot

godotengine

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

⭐ 82996
🚩 12334
C++

pygame

pygame

🐍🎮 pygame (the library) is a Free and Open Source python programming language library for making multimedia applications like games built on top of the excellent SDL library. C, Python, Native, OpenGL.

⭐ 6938
🚩 405
C

engine

playcanvas

Fast and lightweight JavaScript game engine built on WebGL and glTF

⭐ 9103
🚩 572
JavaScript

OpenRA

OpenRA

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.

⭐ 14120
🚩 1570
C#

pyxel

kitao

A retro game engine for Python

⭐ 13146
🚩 7
Rust

bevy

bevyengine

A refreshingly simple data-driven game engine built in Rust

⭐ 32172
🚩 2079
Rust

pixijs

pixijs

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

⭐ 42479
🚩 300
TypeScript
Code

allegro5

liballeg

The official Allegro 5 git repository. Pull requests welcome!

⭐ 1757
🚩 381
C

box2d

erincatto

Box2D is a 2D physics engine for games

⭐ 7269
🚩 42
C++

boardgame.io

boardgameio

State Management and Multiplayer Networking for Turn-Based Games

⭐ 9872
🚩 99
TypeScript

lwjgl3

LWJGL

LWJGL is a Java library that enables cross-platform access to popular native APIs useful in the development of graphics (OpenGL, Vulkan, bgfx), audio (OpenAL, Opus), parallel computing (OpenCL, CUDA) and XR (OpenVR, LibOVR, OpenXR) applications.

⭐ 4580
🚩 79
Java

colyseus

colyseus

⚔ Multiplayer Framework for Node.js

⭐ 5497
🚩 32
TypeScript

nakama

heroiclabs

Distributed server for social and realtime games and apps.

⭐ 8285
🚩 125
Go

bullet3

bulletphysics

Bullet Physics SDK: real-time collision detection and multi-physics simulation for VR, games, visual effects, robotics, machine learning etc.

⭐ 11887
🚩 291
C++

raylib

raysan5

A simple and easy-to-use library to enjoy videogames programming

⭐ 18794
🚩 22
C

egui

emilk

egui: an easy-to-use immediate mode GUI in Rust that runs on both web and native

⭐ 19641
🚩 718
Rust

JoltPhysics

jrouwe

A multi core friendly rigid body physics and collision detection library, written in C++, suitable for games and VR applications.

⭐ 5530
🚩 3
C++

ink

inkle

inkle's open source scripting language for writing interactive narrative.

⭐ 3884
🚩 344
C#

imgui

ocornut

Dear ImGui: Bloat-free Graphical User interface for C++ with minimal dependencies

⭐ 55633
🚩 1004
C++
Art

Pixelorama

Orama-Interactive

Unleash your creativity with Pixelorama, a powerful and accessible open-source pixel art multitool. Whether you want to create sprites, tiles, animations, or just express yourself in the language of pixel art, this software will realize your pixel-perfect dreams with a vast toolbox of features. Available on Windows, Linux, macOS and the Web!

⭐ 6075
🚩 39
GDScript

rx

cloudhead

👾 Modern and minimalist pixel editor

⭐ 3009
🚩 37
Rust

krita

KDE

Krita is a free and open source cross-platform application that offers an end-to-end solution for creating digital art files from scratch built on the KDE and Qt frameworks.

⭐ 6586
🚩 0
C++

LibreSprite

LibreSprite

Animated sprite editor & pixel art tool -- Fork of the last GPLv2 commit of Aseprite

⭐ 4347
🚩 32
C++

blender

blender

Official mirror of Blender

⭐ 11439
🚩 5
C++

goxel

guillaumechereau

Goxel: Free and Open Source 3D Voxel Editor

⭐ 2668
🚩 88
C

piskel

piskelapp

A simple web-based tool for Spriting and Pixel art.

⭐ 10719
🚩 340
JavaScript

aseprite

aseprite

Animated sprite editor & pixel art tool (Windows, macOS, Linux)

⭐ 26470
🚩 1552
C++
Audio

furnace

tildearrow

a multi-system chiptune tracker compatible with DefleMask modules

⭐ 1918
🚩 13
C++

lmms

LMMS

Cross-platform music production software

⭐ 7555
🚩 1090
C++

jfxr

ttencate

A browser-based tool to create sound effects for games.

⭐ 424
🚩 17
JavaScript

audacity

audacity

Audio Editor

⭐ 11364
🚩 1118
C
Design

ldtk

deepnight

Modern, lightweight and efficient 2D level editor

⭐ 3141
🚩 265
Haxe

tiled

mapeditor

Flexible level editor

⭐ 10593
🚩 685
C++
Games

shapez.io

tobspr-games

shapez is an open source base building game on Steam inspired by factorio!

⭐ 6162
🚩 198
JavaScript

devilution

diasurgical

Diablo devolved - magic behind the 1996 computer game

⭐ 8633
🚩 38
C++

warzone2100

Warzone2100

Command the forces of The Project in a battle to rebuild the world after mankind has been nearly destroyed by nuclear missiles. A 100% free and open source real-time strategy game for Windows, macOS, Linux, BSD+

⭐ 3034
🚩 443
C++

warriorjs

olistic

🏰 An exciting game of programming and Artificial Intelligence

⭐ 9359
🚩 19
JavaScript

Mindustry

Anuken

The automation tower defense RTS

⭐ 21011
🚩 165
Java

OpenTTD

OpenTTD

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

⭐ 5911
🚩 260
C++

osu

ppy

rhythm is just a *click* away!

⭐ 14269
🚩 1315
C#

OpenRCT2

OpenRCT2

An open source re-implementation of RollerCoaster Tycoon 2 🎢

⭐ 12889
🚩 1498
C++

openage

SFTtech

Free (as in freedom) open source clone of the Age of Empires II engine :rocket:

⭐ 12376
🚩 204
Python

lila

lichess-org

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

⭐ 14564
🚩 979
Scala

Thrive

Revolutionary-Games

The main repository for the development of the evolution game Thrive.

⭐ 2578
🚩 665
C#