Update: We now have an updated version of the demo, complete with commentary from one of Revelations' producers. Ubisoft continues to unveil more and more information about Assassin's Creed Revelations' single-player as the game's November 15 launch date approaches. We've seen a couple major trailers released and heard some preliminary details about the adventure, but at Gamescom we finally had a chance to see an extended demo featuring both Ezio and Altair in action...