Mangos ZERO is a server for World of Warcraft
Powerful, mature open-source cross-platform game engine for Python
Open source clone of the Age of Empires II engine
A free/open source client and automation tool for Ragnarok Online
4X Space Strategy Game
Vivid3D is a C++ IDE/3D engine, with python scripting.
Cooperative multiplayer graphical RPG and adventure game
Real-time collision detection and multi-physics simulation for VR
Sorry this project is no longer being supported
Cross platform 2D game creation framework with Python bindings
Tactical, turn-based game engine, that uses OpenGL and WinAPI
SuperWikia: The Runtime/Realtime Environment for Codesmiths
2D Multi-directional Shooter
Delphi-like IDE for cross-platform game development