🐍🎮 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.

The Ren'Py Visual Novel Engine

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

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.

LÖVE is an awesome 2D game framework for Lua.

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

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.

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

A retro game engine for Python

A refreshingly simple data-driven game engine built in Rust

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

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

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.

⚔ Multiplayer Framework for Node.js

State Management and Multiplayer Networking for Turn-Based Games

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

The official Allegro 5 git repository. Pull requests welcome!

Box2D is a 2D physics engine for games

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

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

Distributed server for social and realtime games and apps.

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

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.

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

Goxel: Free and Open Source 3D Voxel Editor

Official mirror of Blender

👾 Modern and minimalist pixel editor

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.

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

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!

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

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

a multi-system chiptune tracker compatible with DefleMask modules

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

Audio Editor

Cross-platform music production software

Modern, lightweight and efficient 2D level editor

Flexible level editor

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+

rhythm is just a *click* away!

Diablo devolved - magic behind the 1996 computer game

🏰 An exciting game of programming and Artificial Intelligence

The automation tower defense RTS

An open source re-implementation of RollerCoaster Tycoon 2 🎢

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

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

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

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

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