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

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

A refreshingly simple data-driven game engine built in Rust

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.

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

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

Desktop/Android/HTML5/iOS Java game development framework

Bitmap & tilemap generation from a single example with the help of ideas from quantum mechanics

Archived — A list of games, add-ons, maps, etc. hosted on GitHub. Any genre. Any platform. Any engine.

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

🎮 A step-by-step guide to implementing SSAO, depth of field, lighting, normal mapping, and more for your 3D game.

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.

:a: Web framework for building virtual reality experiences.

A retro game engine for Python

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

:video_game: :pencil: A list of Game Development resources to make magic happen.

Frame profiler

🎮 An open-source game speed modifier.

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

One framework for creating powerful cross-platform games.

A dead simple 2D game engine for Go

Gaming meets modern C++ - a fast and reliable entity component system (ECS) and much more

Scalable open-source game backend server: multiplayer, matchmaking, leaderboards, chat, and social features for games.

A Flutter based game engine.

Cocos simplifies game creation and distribution with Cocos Creator, a free, open-source, cross-platform game engine. Empowering millions of developers to create high-performance, engaging 2D/3D games and instant web entertainment.

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!

3D and 2D game engine written in Rust

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.

🐍🎮 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.

Turn Claude Code into a full game dev studio — 48 AI agents, 36 workflow skills, and a complete coordination system mirroring real studio hierarchy.