My First Gun
Blindsided
Cleaning Up the Berg
Best Minion Ever
The Road to Sanctuary
Plan B
Hunting the Firehawk
A Dam Fine Rescue
A Train to Catch
Essentially, after turning in A Dam Fine Rescue to Roland, this will begin A Train to Catch. Use the nearby fast travel to go back to Sanctuary and speak with Roland again who informs you Handsome Jack isn't trying to open a Vault, he wants to control one. In order to take control of it yourself, you'll need to get the Vault Key from Jack. Roland's spy out in the Tundra Express should know the location of the Key.
Before leaving, make sure you have a fire based weapon or purchase one from Marcus. When you're ready, fast travel to Three Horns - Divide and Catch-a-Ride on your left. Head NW and pop off your ride to enter the fence and entrance to Tundra Express.
Your first goal is to ignite 3 varkids with the fire weapon mentioned earlier. Go N to Varkid Ranch Observatory and shoot enough varkids in a short period of time so several of them are on fire at once. This will trigger a cutscene introducing Mordecai and his BFF Bloodwing.
Mordecai tells you the key will be located aboard the train and Roland suggests you speak to Tiny Tina to find a way to hijack it. Tina is located in her Workshop just to the N but you will have to go to the left or right of the mountain in front of you go get there. Once inside, another cutscene begins to introduce the engineer to you.
Speak with Tina then follow her into the garage where the dynamite bunnies appear to be missing their "badonkadonks" and you have to go fetch them. Leave the Workshop and travel SW to the Buzzard Academy where you fight through a horde of bandits to pick up the two missiles. Now bring them back to Tina and she'll prepare the bombs in her garage.
Pick up your cute weapons of destruction and head E to Meltwater Crossing. Fight through more bandits then climb the ladder up to the platform to setup the bombs facing the train track. Then arm each rocket and the train will sound its approach before one bomb blows up the track and the other hits the actual train. Climb up the destroyed track to enter the area End of the Line.
Stock up to the left before making your way through the one path in this zone. Continue fighting Loader Bots along the way until you reach a clearing where you'll find the fortified train car. Wilhelm will rise from under a train car and engage you in battle. Once he's been dealt with, grab the power core he drops and backtrack to the fast travel. Head back to Sanctuary and turn in the quest to Lt. Davis in the SW outside the gate.
The achievement should pop and you'll be rewarded with:
- Approx $39
- Approx 2730 XP
- Elemental Relic (White)
