Warhead Hunter Achievement
Detonate all of the warheads in the Divide.
Probably the most time consuming part of this add-on, you must hunt down all 30 warheads and detonate them.
A complete list can be found here or follow the video guides below:
Overall this DLC is the toughest, the most rewarding, and the least time consuming of the whole lot of them. You should have a ton of fun, be test at every turn, and really enjoy the plot as it unfolds before your eyes.