The source code to VVVVVV
Powerful, mature open-source cross-platform game engine for Python
Provides efficient allocation free async/await integration for Unity
Open Source MMORPG Framework
Free and open source real-time strategy game
Open source clone of the Age of Empires II engine
A charting and data visualization library for Unity
Simple GTK# Paint Program
A game of dungeon exploration, combat and magic
Cross-Platform C++ 2D/3D game engine
Mangos ZERO is a server for World of Warcraft
Open-source engine for Heroes of Might and Magic III
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
An open source reimplementation of the Among Us Server
A .NET ascii/ansi console engine written in C# for MonoGame and XNA
Write your game with TypeScript in UE or Unity
Cross-platform, open source, and super fast MUD client with scripting
RPG Maker 2000/2003 and EasyRPG games interpreter
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
A shield for the Arduino Mega that can back up video game cartridges
A dead simple 2D game library for Go
3D game engine/framework in C, with Luajit and Python bindings now
Gideros Release version
Homebrew development library for Nintendo 3DS/Horizon OS user mode
2D game development library for Ruby and C++