Valve released new details on the first downloadable add-on for Left 4 Dead 2 today at Microsoft's X10 event, explaining how "The Passing" will handle the meet up with the original Left 4 Dead survivors. Now, let's have some media.

These ten new screens of the new episode, coming to the PC and Xbox 360 in "late March," show off the new "Savannah-esque" coastal town setting and the new Fallen Survivor infected. He's the unlucky undead wearing the bucket hat, bandolier and Molotov cocktail in some of these shots.

You'll also get a peek at what appears to be a new machine gun and the new Black Tie common zombie.