Mod:Fallout: The Frontier/Voss: The Great and Powerful

Voss: The Great and Powerful is the fifth main quest in the Northern Legion quest line.

Background
Rancor will ask you to bring him the C-finder and will then give you the coordinates to Prodigal Station.

Walkthrough

 * Travel to Vault 6
 * Take the pipe door to the Vault 6 Train tunnel.
 * From the entrance you will see a left upper path. Take this path then take the right turn which leads to the train.
 * Once in Prodigal Station you will find Sheriff Coby.
 * If you brought Scrapz and have asked him about his past Scrapz will initiate a dialogue and his companion quest Dead Hearts will begin.
 * Head down to Underland.
 * Talking to either Trader Smith or Co-Overseer Ken will inform you that Voss is in his personal bunker which is locked by three keys. Currently Trapper Johnson is the only one who knows where the spare keys are.
 * If one asked Sheriff Coby if he needs help then he will give you the quest Prodigal Station: Hunting the Hunter.
 * Note that one can opt to head directly to the reactor and grab the three keys without finding Trapper Johnson.
 * Talking to Assistant Adam will reveal that Voss plans to destroy Underworld. One can disable the explosion and / or tell the other robots Dr. Voss' plans.
 * Note that informing Co-Overseer Ken about Dr. Voss's plan is the only way to not have Dr. Voss initially hostile.
 * Go to the lab and confront Dr. Voss.
 * After leaving Prodigal Station you can choose to hand over the C-Finder or leave it in the radio at The Wasted Angel - Rudy's Autos n Parts
 * Talk to the Legate to end the quest

The Three Keys in the Reactor

 * Run straight through the reactor and you will find the first keycard on a crate.
 * Run past those crates and take a left and the second keycard is behind a box on the left.
 * Turn around and run back to the end of the hallway, there you will find a door that can be unlocked with the second key.  It will be right next to Assistant Adam.

Rewards

 * C-Finder
 * Right before facing Dr. Voss you can find an Alien Blaster and 204 alien power cells.