Enigma is a puzzle game
A strategy game with a high fantasy theme
INSTEAD - Simple Text Adventure Interpreter.
A free 3D game engine to create games and realtimes scenes for Windows
An isometric arcade-style game of skill, puzzles and exploration
Heros of Jin Yong 3D Remastered
Cross-platform real-time strategy game (3D)
3D puzzle game based on Kula World and Cubosphere
Tools for Super Tux Kart server operators
2D Open Source MMORPG
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
RTSish Game Engine
2D Game Engine
Alternative Teeworlds Client with many exciting features!
Pioneer, a space adventure game in the 31st Century Milky Way galaxy
A cross platform Lua based game engine
Cross-platform 2D and 3D game engine
3D-Accelerated open-source DOOM engine