0AD, the open source, cross platform, historical RTS is now running a crowdfunding campaign on IndieGoGo in order to pay a programmer to work on the game for 1-2 years, plus other stuff, full time. If the campaign succeeds this could mean that a beta is only a year or so out. And maybe the game will be finished in the next year, at least Part One, which is 500BC to 1BC. Part Two being 1AD to 500AD.
Before you get clever, they know 0AD is not a real year, and they explain the name.
The following is a link to their announcement post:
Here is a direct link to the campaign: