The Hotel

The Survivors start on top of a hotel converted into a evacuation center, recently swarmed by the Infected. The Survivors witness the helicopters moving to a different location, and decide to follow them through the city. The Survivors become acquainted in an elevator and the Survivors must pry the elevator doors, making a loud screeching noise that summons the horde. Afterwards, they must fight through the remainder of the hotel, which is on fire.

Trivia
This hotel is featured in the Zombie Survival Guide trailer, when the Survivors are seeking to get to the evacuation center.
 * In the The Zombie Survival Guide the Survivors know each other at this point, although in-game they do not.
 * The hotel is on fire, which makes a horde scenario near the end difficult due to the screen being fogged up by smoke.
 * The burning hotel could be considered a reference to the Apple Inn Scenario in Resident Evil Outbreak, another zombie co-op game which takes place in a burning hotel.
 * Its possible for a Jockey to ride you out of a window to your death.
 * The beginning of the level is almost identical to the beginning of the original Left 4 Dead in which the Survivors traveled through the city to roof of a living complex only to see their rescue chopper leave them behind.
 * Judging by the dialogue made in the elevator, it is assumed that the Survivors only met each other moments before the intro video ended.
 * This campaign is interesting in that there are initially no shotguns or SMGs available to the Survivors—only melee weapons and pistols. The poster foreshadows this, since it shows the Survivors holding only melee weapons.
 * Just after you go down the first set of stairs, there is a large room to the right that seems to be a conference room. There are many maps all along the table, all showing that the infection has engulfed Philadelphia and half of new jersey completely, while it appears that most other evac locations have small or medium outbreaks. It is assumed that these maps were created in the early stages of the infection, as the whole plot of the game revolves around reaching the cruise ships in the Gulf of Mexico, which are the only safe spots for Americans left, as the mainland has been completely overrun.
 * This is the first time the survivors encounter the CEDA hazmat suit infected.
 * It was at this campaign that the new Left 4 Dead 2 Survivors meet together. It is not known how the Survivors manage to get together, but it is possible that the Survivors followed the sound of the rescue helicopter and coincidentally crossed paths with each other since the start of the campaign at the rooftop which they curse the helicopter for leaving them behind.
 * If one can look behind the survivors before the helicopter takes off, you can see that the copter was very close to the survivors when it took off. They pilot would probably be able to see them, but was most likely not risking rescuing carriers.