If you haven't yet bought The Creative Assembly's latest historical RTS game Empire: Total War, this week is the percent time to do so. Today the game has released its first mini-expansion, The Warpath Campaign, via Steam for $9.99. It adds five new Native American factions and a new playable campaign to the game.But that's not all. The main game is now on sale via Steam for just $24.99, a 50 percent discount, through Monday, October 12. A new patch to the main game has also been released with a number of changes and additions. Finally a previously released Special Forces pack, which adds six extra units to the game, has just been updated with three additional units that were previously unavailable for sale (Death's Head Hussars, the The Dahomey Amazons, and the The USS Constitution ship). It's now on sale for just $2.49.

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