[ Thanks to Chris7mas for this link.
]
“0 A.D. is an open-source, 3D real time strategy game
with an ancient warfare theme, developed by Wildfire Games, and
using the Pyrogenesis engine.“0 A.D. started originally as a mod concept for Age of Empires
II, but in 2009 Wildfire Games licensed the code under the GPL and
announced it will be open-source, available for Linux, Windows and
Mac OS X.“The game is currently under heavy development, and the latest
alpha was released on October 19 2010 (Alpha 2 ‘Bellerophon’) and
it currently includes the following features:”