I spent years wondering what you were like. Thinking about all we missed out on. I want you to know that I'm grateful for the time we've had.Father

Nuclear Family is the final Institute main quest and an achievement/trophy in Fallout 4.

Quick walkthrough

Institute Main Quest: Nuclear Family
Return to The Institute
Initiate dialogue with Father.
Finish the conversation.
Reward: 1500+ XP,
Institute paint mod for X-01 power armor,
Father's lab coat

Detailed walkthrough

Return to the Institute to speak with Father and listen to his final words before he dies of end stage cancer. Shown next is the ending scene, showing glimpses of the Sole Survivor's life prior to the Great War and their experiences since.

This short quest completes the Institute questline. The player character may continue their adventures in the Commonwealth afterward.

Quest stages

10 Speak to FatherShaun needs to know the Commonwealth is finally safe.
200Quest finishedCompletedMy son is gone. I had a chance to say goodbye to Shaun, and must now assume his role as Director of the Institute.
1500Quest failedFailed


  • Once this quest is completed, Father's memorial will appear in the Institute in front of the Robotics division, and Institute synths will patrol the Commonwealth's military checkpoints.
  • If the player kills Father before his natural death, the player will become enemies with the Institute, and this quest will still complete.
  • On page 128 of the Fallout 4 Vault Dweller's Survival Guide the quest icon is different, namely that of a radiant Institute side quest.
  • After this quest is completed, the Sole Survivor becomes the new acting Director of the Institute, and the Institute paint for the X-01 power armor will become available.

See also