Swedish developer Coffee Stain Studio announces plans for a patch for Santum which will add new DLC to their tower defense/first-person shooter hybrid. The update will be called "The Old City," and among other things, it will add two new maps, a new tower, and a new weapon to the game. In the meantime, a free weekend is underway for Sanctum which will conclude Sunday afternoon. Those who enjoy that experience have the opportunity to get the game at a discount, as Steam is offering it at a 50% discount between now and November 7th.