To the guy who said that L4D2 Expert is easier than L4D1, my team and I spent around an hour slugging through the mall, wiping on several occasions. On one golden run we made it past a Tank, the constant hordes, and through the crescendo. It was nothing short of an absolute marathon, with multiple team members going gray and stretching health packs as far as they would go. We moved into the next area, the smell of saferoom and triumph wafting in our noses. Well, the AI Director then decided to drop two Chargers, a Jockey, and a walking witch in the room before us.
Game over.