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

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.

⭐ 7162
🚩 400
C

renpy

renpy

The Ren'Py Visual Novel Engine

⭐ 4739
🚩 232
Ren'Py

GDevelop

4ian

🎮 Open-source, cross-platform 2D/3D/multiplayer game engine designed for everyone.

⭐ 7712
🚩 475
JavaScript

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.

⭐ 7545
🚩 3646
C++

Babylon.js

BabylonJS

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

⭐ 22788
🚩 75
TypeScript

love

love2d

LÖVE is an awesome 2D game framework for Lua.

⭐ 4640
🚩 92
C++

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.

⭐ 14380
🚩 1559
C#

pixijs

pixijs

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

⭐ 43093
🚩 338
TypeScript

pyxel

kitao

A retro game engine for Python

⭐ 14018
🚩 9
Rust

bevy

bevyengine

A refreshingly simple data-driven game engine built in Rust

⭐ 34061
🚩 2246
Rust

engine

playcanvas

JavaScript game engine built on WebGL, WebGPU, WebXR and glTF

⭐ 9339
🚩 572
JavaScript

godot

godotengine

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

⭐ 86750
🚩 12978
C++
Code

allegro5

liballeg

The official Allegro 5 git repository. Pull requests welcome!

⭐ 1803
🚩 381
C

colyseus

colyseus

⚔ Multiplayer Framework for Node.js

⭐ 5642
🚩 40
TypeScript

box2d

erincatto

Box2D is a 2D physics engine for games

⭐ 7421
🚩 44
C++

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.

⭐ 4674
🚩 85
Java

bullet3

bulletphysics

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

⭐ 12200
🚩 312
C++

boardgame.io

boardgameio

State Management and Multiplayer Networking for Turn-Based Games

⭐ 9931
🚩 101
TypeScript

egui

emilk

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

⭐ 20814
🚩 757
Rust

raylib

raysan5

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

⭐ 20532
🚩 30
C

ink

inkle

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

⭐ 3974
🚩 324
C#

nakama

heroiclabs

Distributed server for social and realtime games and apps.

⭐ 8613
🚩 117
Go

JoltPhysics

jrouwe

A multi core friendly rigid body physics and collision detection library. Written in C++. Suitable for games and VR applications. Used by Horizon Forbidden West.

⭐ 5957
🚩 4
C++

imgui

ocornut

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

⭐ 57999
🚩 1049
C++
Art

blender

blender

Official mirror of Blender

⭐ 12214
🚩 0
C++

rx

cloudhead

👾 Modern and minimalist pixel editor

⭐ 3068
🚩 37
Rust

goxel

guillaumechereau

Goxel: Free and Open Source 3D Voxel Editor

⭐ 2729
🚩 85
C

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.

⭐ 6945
🚩 0
C++

LibreSprite

LibreSprite

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

⭐ 4623
🚩 38
C++

aseprite

aseprite

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

⭐ 27683
🚩 1591
C++

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!

⭐ 6452
🚩 40
GDScript

piskel

piskelapp

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

⭐ 10922
🚩 344
JavaScript
Audio

jfxr

ttencate

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

⭐ 429
🚩 18
JavaScript

furnace

tildearrow

a multi-system chiptune tracker compatible with DefleMask modules

⭐ 2093
🚩 32
C++

audacity

audacity

Audio Editor

⭐ 11831
🚩 1228
C

lmms

LMMS

Cross-platform music production software

⭐ 7813
🚩 1072
C++
Design

ldtk

deepnight

Modern, lightweight and efficient 2D level editor

⭐ 3275
🚩 290
Haxe

tiled

mapeditor

Flexible level editor

⭐ 10843
🚩 702
C++
Games

osu

ppy

rhythm is just a *click* away!

⭐ 14685
🚩 1305
C#

warriorjs

olistic

🏰 An exciting game of programming and Artificial Intelligence

⭐ 9396
🚩 19
JavaScript

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+

⭐ 3118
🚩 428
C++

devilution

diasurgical

Diablo devolved - magic behind the 1996 computer game

⭐ 8663
🚩 38
C++

OpenRCT2

OpenRCT2

An open source re-implementation of RollerCoaster Tycoon 2 🎢

⭐ 13167
🚩 1436
C++

openage

SFTtech

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

⭐ 12523
🚩 207
Python

Mindustry

Anuken

The automation tower defense RTS

⭐ 21668
🚩 173
Java

shapez.io

tobspr-games

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

⭐ 6265
🚩 195
JavaScript

OpenTTD

OpenTTD

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

⭐ 6097
🚩 274
C++

Thrive

Revolutionary-Games

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

⭐ 2698
🚩 694
C#

lila

lichess-org

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

⭐ 14847
🚩 1050
Scala