A strategy game with a high fantasy theme
Enigma is a puzzle game
A free 3D game engine to create games and realtimes scenes for Windows
Cross-platform real-time strategy game (3D)
2D Open Source MMORPG
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
RTSish Game Engine
Offline build planner for Path of Exile
Tongue-in-cheek action RPG
A free engine for C&C Tiberian Dawn
Pear3DEngine is a modern and modular 3D development framework
Sunset of Blood Repository
A complete 2D Game Engine with built in drag and drop editor
Space Combat Game
Raid_Finder