Blood Harvest

Blood Harvest is the fifth (originally, fourth) campaign in Left 4 Dead. The Survivors must travel to a barricaded farmhouse and get rescued by the United States military. The escape vehicle is a U.S. military armored personnel carrier. The Survivors are taken to Millhaven by the military at the end of this campaign and make their way south on a train as explained in the canonically correct comic The Sacrifice, along with the campaign of the same name. On August 5th, Valve announced the the campaign will be ported to L4D2, provided that 60,000 players finish the Dead Air campaign on L4D2.

Below is a complete list of video walkthroughs of the 5 levels:


 * 1) The Woods
 * 2) The Tunnel
 * 3) The Bridge
 * 4) The Train Station
 * 5) Farmhouse Finale

Please note that the gameplay videos are on each campaign's info page not on each map page.

Official description
Zombies lurk behind every tree, over every hilltop and behind every shadow in this terrifying moonlit search for a rumored evacuation zone to the north: several acres of back-country farmland taken over by the military to get the last of humanity out of Ground Zero. Plunge through pitch-black forests, stumble blindly through fields of swaying corn, and take aim at the silhouettes leaping at you from the darkness—all towards finding a hold-out that might already have been abandoned to the horde.

Graffiti
Safe room graffiti in this campaign is the usual mixed bag of content and literary communication values.

Of note are those inscriptions urging survivors to get to a safe zone by following "the train tracks."

Although not graffiti, the Survivors encounter a number of new official signs bluntly instructing members of the general public as to how to behave when approaching a military-controlled facility.

One says: ''"Keep your hands above your head in the field at all times or you will be shot on sight!" ''while another says:

#Do not run at military personnel.
 * 1) Do not ignore personnel when they address you.
 * 2) Do not make any violent or sudden movements.

Similar signs are also seen when arriving at the Bridge in Left 4 Dead 2.

The map on the farmhouse wall in the radio room is labeled Candy Mountain.

Setting
As revealed by a park sign at the starting location, this campaign takes place in and around Allegheny National Forest in Western Pennsylvania, a couple hours' drive from the city of Pittsburgh. The comic The Sacrifice confirms this by having a note about Evacuation Outpost Echo being in upstate Pennsylvania.

Achievements

 * See Main Article: Achievements

Behind the Scenes
Beta versions of Blood Harvest were much greener and brighter than the final version. In addition, there is no fog, making the sky much more visible.

Some chapters of this campaign were also different:
 * 1) The Hilltop
 * 2) The Train Tunnel
 * 3) The Bridge
 * 4) The Barn
 * 5) The Cornfield