End of the Line is a quest that can be obtained within the Commonwealth, in Fallout 4.
With the Institute's future secure, the time has come for them to show their hand to the Commonwealth, and the cards are bloody and merciless.
- Speaking with Father, it is revealed that the Directorate, including Father, have all decided that The Railroad must be eliminated in their entirety at Railroad HQ.
- Upon arriving at Railroad HQ, The Railroad will still remain peaceful towards the Sole Survivor, entirely dependent on the Sole Survivor never having done nothing to invoke hostile actions from them.
- This will be the last chance to embark upon The Railroad's quest line finale, as warning them of the Institute's intentions will make the Institute permanently hostile.
- Otherwise, kill Desdemona, Glory, Tinker Tom, Doc Carrington, and Deacon.
- Return to Father.
It should be noted, that Deacon must also be eliminated, which means the loss of a permanent companion, as well as it being likely that he will have to be tracked down outside of Railroad HQ, as he tends to wander, or may have been placed within one of the Sole Survivor's settlements.