Destroying the Railroad and the Brotherhood in the Fallout 4 Institute Ending
Episode 16 of our Fallout 4 walkthrough is the Institute finale. It starts at the Directorate board meeting, then moves through the assault on Railroad HQ, the raid on Boston Airport, and the hack that turns Liberty Prime against the Prydwen. After the airship falls we return to Father for the last conversation. This episode covers End of the Line, Airship Down, and Nuclear Family.
Directorate Meeting and the Order to End the Railroad
We begin at the Directorate board meeting. The Institute leadership decides the Railroad can no longer be allowed to operate. After the meeting we speak with Father, who confirms the order and sends us to Old North Church. We teleport to the surface, enter the church, use the Freedom Trail code path into Railroad HQ, and kill everyone inside, including Desdemona and the rest of the leadership.
Once the base is cleared we escape through the tunnels, teleport back to the Institute, and report to Father. He acknowledges the cost of the operation and immediately points us toward the Brotherhood of Steel.
Speaking with Evan Watson and Planning Airship Down
Father sends us to Evan Watson in Advanced Systems. Watson and Rosalind Orman lay out the plan: infiltrate Boston Airport, destroy the Brotherhood’s generators so synth reinforcements can warp in, then defend a synth while it uploads a virus into Liberty Prime. The goal is to make the giant robot treat the Prydwen as a communist threat and destroy it.
We take the molecular relay to the airport and begin the assault.
- Lore Fact: If Madison Li is no longer with the Institute, Evan Watson handles the briefing for Airship Down. Rosalind Orman designed the virus that rewrites Liberty Prime’s targeting so it sees Brotherhood forces as Chinese communists.
Infiltrating Boston Airport and Destroying the Generators
We infiltrate the airport terminal and fight through Brotherhood soldiers, turrets, and Vertibird support. Three generators have to go down. Each destroyed generator lets more Institute synths teleport in, which makes the push toward Liberty Prime much easier.
After the last generator is destroyed we move onto the scaffolding around Liberty Prime.
Defending the Synth While It Hacks Liberty Prime
A synth begins uploading the virus into Liberty Prime’s systems. We hold the platform while Brotherhood knights, Paladins, and even Elder Maxson try to stop the hack. When the upload finishes, Liberty Prime identifies the Prydwen as the new communist target and fires its eye lasers into the airship.
The Prydwen goes down in a massive explosion. We are teleported away from the blast just before the wreckage hits the airport.
Speaking with Father and the Institute Ending
We return to the Institute and speak with Father. He is in his final hours. A short cutscene follows as he says goodbye, completing Nuclear Family and locking in the Institute ending of Fallout 4. The Railroad is gone, the Brotherhood airship is destroyed, and the Sole Survivor is left as Director of the Institute.
