Derailer is a Black Ops Mission in Blacklight: Tango Down.
Derailer follows Blacklight deeper into the city. Apparently the subway has reemerged as one of if not the most significant means of travel.
Derailer has an underground level and a high ground within a structure which is accessible by each spawn and the map center.
Gameplay Description Edit
Travel on the subway level can be extremely dangerous as trains continuosly arrive and depart from the north and south entrances. Any hit is fatal.