I don't know if any of y'all are a fan of Paradox Interactive's games (Hearts of Iron series, Europa Universalis series, King Arthur, Magicka etc), but they're coming out with Crusader Kings II in a bit over two weeks (February 14th), with a demo no later than the 5th.
http://www.youtube.com/watch?v=wvofoXhcDZc&feature=fvst
If you preorder it you get the first two DLC's for free, and it's available on GamersGate as well as Steam and Origin.