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
#7libgdx/libgdx
Desktop/Android/HTML5/iOS Java game development framework
#8mxgmn/WaveFunctionCollapse
Bitmap & tilemap generation from a single example with the help of ideas from quantum mechanics
#9lettier/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.
#10cocos2d/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.
#11aframevr/aframe
:a: Web framework for building virtual reality experiences.
#12kitao/pyxel
A retro game engine for Python
#13bkaradzic/bgfx
Cross-platform, graphics API agnostic, "Bring Your Own Engine/Framework" style rendering library.
#14ellisonleao/magictools
:video_game: :pencil: A list of Game Development resources to make magic happen.
#15wolfpld/tracy
Frame profiler
#16game1024/OpenSpeedy
🎮 An open-source game speed modifier.
#17cocos/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.
#18Orama-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!
#19o3de/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.
#20FyroxEngine/Fyrox
3D and 2D game engine written in Rust
#21pygame/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.
#22Facepunch/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
#23defold/defold
Defold is a completely free to use game engine for development of desktop, mobile and web 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)
#27djeedai/bevy_hanabi
🎆 Hanabi — a GPU particle system plugin for the Bevy game engine.
#28markusmoenig/Eldiron
Create cross-platform classic RPGs in 2D and 3D with powerful built-in world editing tools.
#29Glade-tool/glade-mcp
Connect any MCP-compatible AI client (Claude Code, Cursor, Windsurf) to Unity or Godot. 235+ granular tools, a Unity-aware system prompt, game design document project context, script semantic search, and skill calibration.