There is also a deal for 66% off the game and all DLC that is running along side this as well.
The free weekend and sale are both going on now. Free weekend ends Sunday, 1pm and the 66% off ends Monday, 10am pst.
EDIT: Added the link for quick access. The download for the free weekend is towards the bottom near the ad. You must have the Steam app downloaded to play the game.
Edited by Manifest95, 21 September 2012 - 04:03 PM.