Left 4 Dead 2 The Passing, is a fantastic adventure where all Left 4 Dead 2 survivors meet three original survivors from the second part of the game and the first game, L4D. They need to help each other in order to continue on their way to New Orleans. Resupplying the generators with the fuel to lower the bridge is a main task for the group of four, while the original survivors providing a covering fire.
The Passing DLC campaign takes place between Dead Center and Dark Carnival, and after the events of The Sacrifice campaign. The Survivors of L4D2 arrive at the bridge in Rayford, where they meet Francis, Louis, and Zoey.As they need to cross the bridge to proceed, the Survivors need to find another way across to refill the generator with gas. After fighting their way through a wedding reception (complete with a Witch bride), the streets, and a historic under-the-river tour, they meet up again with the original Survivors, who help by covering for the group while they fill the generator and lowering the bridge once it’s full.