The Widowmaker

Get Inside the Warehouse: You don't actually need to take out every single cultist hanging around the Grain Elevator. The easiest way in, especially if you've got the Locksmith Perk, is to sneak around to the back of the warehouse and pick the lock on the door. If you don't have that perk, you can find a key, but it means dealing with guards, which isn't really recommended. Another option is to go around the back of the *other* building nearby, climb onto its roof, and then get inside through a boarded-up window. Follow the path from there, and you'll find a zipline that takes you right onto the warehouse roof and inside. Whichever way you choose, once you're in, you need to get into the Widowmaker truck and drive it out of there.

Ram Through Roadblocks: Now you need to get the Widowmaker back to Fall's End, and yeah, there are going to be roadblocks. Don't sweat it too much, this truck is tough as nails. It'll take a serious beating before it blows, so just try not to be too careless or drive into any explosions. As soon as you leave the warehouse compound, take a left. You'll get directions for the truck's route. Keep your speed up going through the roadblocks. Use the truck's mounted machine guns to help clear out any cultists trying to stop you. Your main priority is shooting those explosive gas trucks from a distance – just make sure you avoid the blast radius. Aim to hit the center of the roadblocks to keep your momentum going.

Return The Widowmaker: After you've smashed through the ninth roadblock, just keep following the road you're on. It'll lead you straight back to Fall's End. Once you get to the Spread Eagle bar, reverse the truck into the parking spot and then hop out and talk to Mary May. Mission complete! You'll unlock The Widowmaker as a vehicle you can call in at any garage, which is super handy.