Blood Harvest is the fifth and final (on first release, the fourth) campaign in Left 4 Dead. After their rescue aircraft is lost, the Survivors hide out in a forest until learning of a nearby military outpost located at a barricaded farmhouse. They set off through the forest and follow a series of train tracks until entering a military controlled area only to discover the outpost is abandoned. A radio call to the army base at Millhaven triggers the finale and they must hold out until an armored personnel carrier arrives. Below is a complete list of video walkthroughs of the 5 levels: