The Bridge (Left 4 Dead 2)

The Table Bridge
The table bridge (name unofficial but stated for convienience) is the final map in '''The Parish. '''after the survivors have escaped from the ruins of New Orleans, they learn that the U.S. army is abandoning the mainland, trying to hold out at sea on large cruise ships&lt;ref&gt; the survivors take this chance, and make a run for it.

Walkthrough
The survivors start out in a small saferoom, aparently constructed out of a maintance room for the bridge, which exits into the northern point of the bridge. the route back to the city has been blocked, and there is a corpse with a radio proped up against the concrete baracade, apparently this gives the army a message to hold out until the survivor get to the docking point on the other side of the bridge.

the survivors then have to navigate the stalled out busses and trucks that line the bridge, and also sections of the overhanging deck that has colapsed, until they finaly reach the end, where they are rescued and the game ends.

Referances
http://e3.gamespot.com/video/6211469/