I've searched and didn't found any topics about this game, so I made my contribution :)
"0 A.D. is a free, real-time strategy game currently under development by Wildfire Games. It's cross-platform, 3D and historically-based. Wildfire Games is switching from a closed development process to open source, making the game's code available as GPL and the art content available as CC-BY-SA. People are encouraged to reuse and learn from and improve our work. We are not releasing a playable game, but we want to show what we have achieved and make it easier for more people to get involved in bringing it closer to completion."
Web: http://wildfiregames.com/0ad/
Moddb: http://www.moddb.com/games/0-ad
Screenshots: http://wildfiregames.com/0ad/album_cat.php?cat_id=49
Imho, this game have a great potential!

Looks very similar to Age of Empires, sounds a little bit like Caesar.
I'll be keeping an eye on this one, that's for sure!

I agree, very promising.

I love Linux games, but I've never liked RTSs. I'll give it a try anyway.
Heck, I know how to program, I can contribute if I want. :3

0 A.D. has been in development for over four years now. I'm not sure whether going open source can save it.