Best Open Source gamedev Libraries
A curated list of the most popular GitHub repositories tagged with gamedev. Select any project to visualize its architecture and dive into the codebase using RepoMind's AI engine.
#1godotengine/godot
Godot Engine – Multi-platform 2D and 3D game engine
#2ocornut/imgui
Dear ImGui: Bloat-free Graphical User interface for C++ with minimal dependencies
#3bevyengine/bevy
A refreshingly simple data-driven game engine built in Rust
#4phaserjs/phaser
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.
#5raysan5/raylib
A simple and easy-to-use library to enjoy videogames programming
#6emilk/egui
egui: an easy-to-use immediate mode GUI in Rust that runs on both web and native
#74ian/GDevelop
🎮 Open-source, cross-platform 2D/3D/multiplayer game engine designed for everyone.
#8libgdx/libgdx
Desktop/Android/HTML5/iOS Java game development framework
#9mxgmn/WaveFunctionCollapse
Bitmap & tilemap generation from a single example with the help of ideas from quantum mechanics
#10lettier/3d-game-shaders-for-beginners
🎮 A step-by-step guide to implementing SSAO, depth of field, lighting, normal mapping, and more for your 3D game.
#11cocos2d/cocos2d-x
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.
#12aframevr/aframe
:a: Web framework for building virtual reality experiences.
#13kitao/pyxel
A retro game engine for Python
#14bkaradzic/bgfx
Cross-platform, graphics API agnostic, "Bring Your Own Engine/Framework" style rendering library.
#15ellisonleao/magictools
:video_game: :pencil: A list of Game Development resources to make magic happen.
#16wolfpld/tracy
Frame profiler
#17game1024/OpenSpeedy
🎮 An open-source game speed modifier.
#18cocos/cocos-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.
#19Orama-Interactive/Pixelorama
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!
#20o3de/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.
#21FyroxEngine/Fyrox
3D and 2D game engine written in Rust
#22pygame/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.
#23Facepunch/sbox-public
s&box is a modern game engine, built on Valve's Source 2 and the latest .NET technology, it provides a modern intuitive editor for creating games
#24ultralight-ux/Ultralight
Lightweight, high-performance HTML renderer for game and app developers.
#25Kavex/GameDev-Resources
:video_game: :game_die: A wonderful list of Game Development resources.
#26AlmasB/FXGL
Java / JavaFX / Kotlin Game Library (Engine)
#27CrossGL/crosstl
Universal Programming Language & Translator
#28zenstory-ai/novel-to-game
Agent skills for source-grounded novel-to-game adaptation (小说改编游戏 / story to game): cited design docs, target-runtime builds, evidence-based QA. Three playable browser examples. For Claude Code, Codex, and Kimi Code.
#29godot-go/godot-go
Go bindings for Godot 4.7 GDExtension API
#30esengine/estella
A fast 2D and 3D game engine — TypeScript SDK, C++/WebAssembly core, visual editor. Ship one project to web, desktop, WeChat MiniGames, playable ads, and native Android / iOS.
#31SummerEngine/summer
The game engine built for AI. MCP server, CLI and skills that let any agent build, test and publish full games with Summer Engine.