The Parish

Chapter 1 - The Waterfront

Chapter 2 - The Park

Chapter 3 - The Cemetery

Chapter 4 - The Quarter

Finale - The Bridge

This campaign has quite a few one-ways, but also some that look like it but aren't.Believe it or not, some people think this is a one-way, because they never hug the walls or never look behind them.You need to wait for all teammates to join you, so it doesn'tcount, but once you open the second door, the first door you entered in is sealed shut.Inexperienced players may think this is a one-way, but you can actually jump onto the van after crossing, and go back on the bus/balcony.Thismanhole is also pretty famous, it's really deadly in VS mode. Watch out for Special Infected hiding behine the white van, and enter it together.The last one-way in the cemetery is after a plane bombs the bridge, and you must drop onto the pile of rubble. Not much to say, because it's easy to shoot above even when you already dropped down.Once you walk off this walkway, you can't go back. It's not that hard to shoot above though.[edit] you can actually jump on some pipes in one of the alleys to get back to the balconyThis dropdown looks like a one-way, but actually you can climb back over the fence using the van just outside. Note that you will have to go through the building and up the stairs again though.Just before the parade float horde event, you will need to go off the topmost balcony and onto a roof/the lower balcony.Once you go off the small ledge or the bus, you can't go back up. It's right near the end and when the helicopter arrives.