Mariner Valley
Mariner Valley is the area in which the Demons of the Badlands DLC takes place.
Not much is known about Mariner Valley, other than the fact that it is separate from the game's main world. There is a grand marauder city on mariner valley, with every member of it fighting the EDF. Geographically is quite interesting, some features include: caves, hills, mountains and various depressions. While the player is roaming freely, the remains of the Ultor company can be seen in the area. Coexisting (aggressively) with the Marauders are many EDF forts and settlements. The war between EDF and Marauders have last since the foundation of the previous one.