Apparently there was a reveal the other day for an upcoming "Two Cities" update for Team Fortress 2. I had no idea about it until today when the second day of reveals was released. This seems to be a an update focused on the Mann vs. Machine game mode.

Today includes a new video, The Sound of Medicine, which shows off some new Medic abilities. Today's update page includes additional details on new Medic and Soldier capabilities in addition to the Rottenburg map reveal.

Yesterday's update page talks about the Mannhattan map, new unique weapon skins, and also a new control point map, Snakewater. Both days include information on new achievements tied to the new MvM maps.