Shogun 2 TW - $7.50 @ Amazon

http://www.amazon.com/gp/product/B004QZAE06/

7.50 for Steam code
2.50 for the Rise of the Samurai campaign DLC

It probably will go on sale in the Steam sale at some point, but it'll probably match this at best (I can't imagine it going cheaper).

Was just on sale for Steam a few days ago (now $14.99). Great deal. I paid $40 for it a few months ago. Has multiplayer coop campaign which is awesome. The DLCs aren't worth the money and would be nice if the devs spent more time fixing more bugs than making them.

The game does have seriously long loading times, especially if you run in DX11 mode and do not have an SSD.

wow thats a ridiculous price. Have the game already but figured the add-on is probably worth 2.50

Wow really low price! I was even considering on buying this when it came out!