Sacrifice Campaign

Lore & Background

The Sacrifice takes place after the "Blood Harvest" campaign of the first Left 4 Dead game and leads up to the events of "The Sacrifice" downloadable campaign for Left 4 Dead 2. From the end of "Blood Harvest", the four Survivors—Zoey, Louis, Francis, and Bill—are rescued by the U.S. Army and taken to Millhaven, a well-fortified army base. They are immediately split up; Francis and Louis are put into an isolation room, while Bill and Zoey are tested by a doctor.

All four learn that they are "Carriers", having the virus yet showing no symptoms. Zoey herself is horrified to learn that her father, who requested she kill him before he turned, had the Carrier gene, meaning his death could have been avoided. They describe to Lt. Mora how the Infection has mutated to create "Special" Infected with unique abilities. Though Lt. Mora agrees with the Survivors' reports, his superior, Everly, is highly skeptical and refuses to take steps to consider evacuating the base despite not receiving orders for the last nine days.

Mora overthrows Everly and sounds the evac alarm, unintentionally drawing Infected that attack the base. As Mora's squad attempts to hold back the Infected, Bill, Zoey, Louis, and Francis, along with two befriended soldiers and a doctor (who is also immune), attempt to make their way to a nearby trainyard to a train south towards Florida. After a series of events including a Tank attack and the death of the two soldiers, the four Survivors board a train and travel south.

Bill explains his plan is to get them to the islands of the Florida Keys, as the Infected cannot swim. At a town at the end of the line, they search for a boat. They find a sailboat filled with provisions and medicine, but to get it downriver they must raise a rusty old bridge. They start nearby generators and prepare to fight the horde while waiting for the bridge to be raised, but soon the nearest generator gives out.

Bill, without pause, jumps off the bridge and makes his way to the generator, restarting it as three Tanks strike him and maul him to death. Francis attempts to go after Bill but Zoey stops him, sadly commenting that Bill's sacrifice will have been for nothing. After waiting for the horde to disperse, the three quietly return to the boat and set course to the Keys.

Did You Know?

• The Sacrifice comic was released in four parts, with the first part released on September 14, 2010, and each following part released every week up until the release of The Sacrifice in the games.
• Valve released versions of the comic without text or speech bubbles specifically for fans to localize into other languages or make their own dialogue.
• The full comic was published by Dark Horse Comics in 'Valve Presents: The Sacrifice and Other Steam-Powered Stories', a volume released in November 2011.
• Valve stated that Bill was chosen to die because they wanted the sacrifice to be done by the most impacting and favorite character by both Valve and the community, and because his story matched The Sacrifice well.