The Apartments

The Apartments is the first chapter of the No Mercy campaign.

The Survivors start off on the roof of an apartment block under a sheet with a table of Tier 1 weapons, ammo and first-aid kits. A helicopter flies past and through a loudspeaker tells them to make their way to Mercy Hospital where they will be evacuated. One of the survivors then says that they can get there through the subway.

They must initially work their way down, through apartments using stairs and a hole in the floor. Once at the bottom, they exit to an alleyway, followed by a main street. Several cars can be found along the way and one sets off alarms when shot at, hit by melee, or jumped on which will attract The Horde.

The Survivors will eventually find their way to the safe room which is the entrance to the ruined subway.

Exploit
When you spawn and grab your weapon and medpack you may do a 180 degree turn and jump off the building make sure you land on the two generators. You might want to check where they are before jumping. You will skip the apartments and there will be fewer zombies.It is best to simply walk off, as you will only lose 17 damage this way. This exploit will not work in versus mode, as the generators (they look more like air conditioning units) have been removed.

Video Walkthrough
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Easter egg
On one of the newspapers their is an image of what appears to be Dr. Breen, who is from another of Valve's series, Half-Life 2.