The Church

The Church is the third chapter of the second campaign, Death Toll. The survivors begin in the last safe room, a lone caboose. Upon exiting the car, they find themselves in a train yard. The train yard is mostly wide open, containing a few trains that have been disconnected from the rest of their consists, and a watch tower. As they continue through the chapter, they go down a street, and eventually enter a cemetery. Next to the cemetery is Valley Church, with the chapter's safe room inside. When they try to enter the safe room, they find that there is already a man inside. As they listen to the man inside, it is revealed that he had previously let someone else inside about an hour before the survivors arrived, who ended up biting him. He says that he is 'better safe than sorry' (which he has written on a wall many times) and challenges the survivors to prove that they aren't infected by ringing the church bell. This bell starts the chapters mini-finale. After the survivors have successfully fought off the hordes ,the man inside can be heard coughing. The safe room door will open, and one of the three playable boss infected will spawn in the area right when you walk in (Hunter, Smoker, or Boomer). After killing him, the survivors can freely enter the safe room.

Easter Eggs

 * In the church is graffiti that has the names and death dates of the developers of Left 4 Dead. The majority of them died in October, 2009.
 * At the chapter's starting safe room, if the player lingers in the caboose for too long (read as: a few minutes), the Infected will begin coming as though they had already left. This is an interesting way of racking up kills, since the Common Infected can't break down the door, and the Special Infected's attacks (i.e., the Boomer's vomit or a Smoker's tongue) won't get through the bars or windows.
 * While the caboose IS a safe room with barred-up doors and windows, it is not uncommon for railroads to include bars on the windows of locomotives and cabooses to prevent vandals from getting in.