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

Quick walkthroughEdit

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Walkthrough Edit

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 player character'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 stagesEdit

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


  • Once this quest is completed, Father's memorial will appear in the Institute, 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.
  • In the Fallout 4 Vault Dweller's Survival Guide[1] the quest icon is different, namely that of a radiant Institute side quest.

See alsoEdit


  1. Page 128