What are all the l4d2 campaigns?

Currently, Left 4 Dead has six campaigns playable in Campaign and Versus, with the seventh only available in Survival. They are, in chronological order:

1. No Mercy―In Fairfield, after a narrow escapewith the Infected, the Survivors focus on moving towards a Hospital for evacuation from a passing News 5 helicopter. The Survivors move from an apartment building, subway station, sewer, Mercy Hospital, right up to a Rooftop Finale.

2. Crash Course―See Downloadable Campaigns.

3. Death Toll―The Survivors have finally made it to where Riverside lies. Due to the pathway blocked on theabandoned highway, the Survivors follow the drainage system of Riverside, to a church, into the town of Riverside, and finally to a boathouse on the riverbank. There, the Survivors wait for rescue from a civilian fishing boat.

4. Dead Air―With the Survivors stranded in a large greenhouse full of Infected, they witness a plane fly by overhead. Deciding the best way to escape the city is via the airport, they make their way through a metropolitan area, over rooftops, a construction site, an air station terminal, and finally, a last stand at aRunway Finale. There, the Survivors see a C-130 Hercules plane that has run out of fuel, and needs help refuelling.

5. Blood Harvest―Lost in the middle of a thick forest, the Survivors follow the path to a trainyard, and through arepair warehouse. Following the railway lines, they move past a bridge, a train station, and finally to aFarmhouse Finale. With nobody in sight, the Survivors call via a radio to the military, and from there, wait for a armored personnel carrier to pick them up. But in the meantime, the Infected have discovered their location....

6. The Sacrifice―Escaping Millhaven on a train, the Survivors are now busting through a dock port, a brick factory―all ending on a bridge. And "all" includes one of the Survivors' lives...