Left 4 Dead 2No Mercy Blastoff00:00:00100:09:56.8830000Apartments00:00:20.443000000:00:20.4430000Subway00:01:40.962000000:01:20.5190000Sewer00:03:08.635000000:01:27.6730000Hospital00:05:56.353000000:02:47.7180000Rooftop00:09:56.883000000:04:00.5300000