The Vault - Fallout Wiki

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The Vault - Fallout Wiki
Brother Against Brother
Quest data
LocationDiamond City
Editor IDFFDiamondCity12
Base ID0014bf48

Brother Against Brother is a quest in Fallout 4.


The synth paranoia has gripped Diamond City with a particular ferocity, ever since the Broken Mask Incident, and shows no signs of subsiding even as late as 2287. The Sole Survivor can get a taste of the situation when they enter Diamond City before locating Nick Valentine.


  • This "quest" is a scripted encounter in Diamond City, where the player runs into an altercation in the Diamond City market. Kyle has taken a gun to his own brother, Riley, convinced that he is a synth. Regardless of what the player does, Riley dies, shot to death by Diamond City security. The only exception is that the player can kill Riley to hasten the inevitable conclusion.
Fallout 4 quests