Best Open Source game Libraries
A curated list of the most popular GitHub repositories tagged with game. Select any project to visualize its architecture and dive into the codebase using RepoMind's AI engine.
#1dkhamsing/open-source-ios-apps
:iphone: Collaborative List of Open-Source iOS Apps
#2pixijs/pixijs
The HTML5 Creation Engine: Create beautiful digital content with the fastest, most flexible 2D WebGL renderer.
#3Anuken/Mindustry
The automation tower defense RTS
#4libgdx/libgdx
Desktop/Android/HTML5/iOS Java game development framework
#5ppy/osu
rhythm is just a *click* away!
#6lichess-org/lila
♞ lichess.org: the forever free, adless and open source chess server ♞
#7mahmoud/awesome-python-applications
💿 Free software that works great, and also happens to be open-source Python.
#8kitao/pyxel
A retro game engine for Python
#9OpenRA/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.
#10OpenRCT2/OpenRCT2
An open source re-implementation of RollerCoaster Tycoon 2 🎢
#11hajimehoshi/ebiten
A dead simple 2D game engine for Go
#12egametang/ET
Unity3D Client And C# Server Framework
#13olistic/warriorjs
🏰 An exciting game of programming and Artificial Intelligence
#14diasurgical/DevilutionX
Diablo build for modern operating systems
#15AirtestProject/Airtest
UI Automation Framework for Games and Apps
#16diasurgical/devilution
Diablo devolved - magic behind the 1996 computer game
#17RandyGaul/cute_headers
Collection of cross-platform one-file C/C++ libraries with no dependencies, primarily used for games
#18HearthSim/Hearthstone-Deck-Tracker
A deck tracker and deck manager for Hearthstone on Windows
#19HFO4/gameboy.live
🕹️ A basic gameboy emulator with terminal "Cloud Gaming" support
#20Kavex/GameDev-Resources
:video_game: :game_die: A wonderful list of Game Development resources.
#21GameServerManagers/LinuxGSM
The command-line tool for quick, simple deployment and management of Linux dedicated game servers.
#22AlmasB/FXGL
Java / JavaFX / Kotlin Game Library (Engine)
#23opengaming/osgameclones
Open Source Clones of Popular Games
#24widelands/widelands
Widelands is a free, open source real-time strategy game with singleplayer campaigns and a multiplayer mode. The game was inspired by Settlers II™ (© Bluebyte) but has significantly more variety and depth to it.
#25freeorion/freeorion
Source code repository of the FreeOrion project.
#26tcgdex/cards-database
Pokémon Trading Card Game Card (TCG) Database for the TCGdex API. ⭐ Leave a star if the project interest you !
#27bradharding/doomretro
The classic, refined DOOM source port. For Windows PC.
#28pmh1314520/MCTier
A virtual LAN gaming tool built for gamers, compatible with all LAN games. Easily bypass network restrictions to play with friends online. | 一款专为玩家打造的虚拟局域网联机工具，支持所有局域网游戏联机使用，让您可以轻松与好友跨越网络限制，享受联机游戏的乐趣。【QQ交流群：1075096452】
#29joedwards32/CS2
CS2 Dedicated Server Docker Image
#30PasitYuu/pika-panels
Ultimate Universal Comic Reader Platform 2026
#31ChurchTao/Daoyou
《万界道友》是一款以 AIGC 驱动、高自由度文字体验、修仙世界观为核心的开源游戏。在这里，你将以普通修士之身，借功法、灵根、神通、法宝与奇遇，一步步推演自己的修行之路。
#32brandonp2412/BlockDrop
Cross-platform falling-block puzzle game with responsive controls, multiple themes, score tracking, hold, and piece previews. Built with Flutter.
#33wynzel/launchpad-lalapalooza
LaLa Trainers Launcher 2026: Smart Workout Automation Hub