Thicker Than Water

Ally: Thicker Than Water is an ally quest for Beckett in the Fallout 76 Wastelanders update.

Background
Help Beckett kill the Claw and rescue his brother before it's too late.

Walkthrough
Talking with Beckett at one's C.A.M.P. He suggests going to Watoga Underground, where the player character can speak with Beckett and Ronny. One will be given the key for future access. Enter the underground with Beckett and fight through the enemies. Eventually, one will reach a big red button to open the garage door.

Press the button and kill all remaining Blood Eagles and their robots. Several raiders from Edwin's gang will help in the fighting. Afterwards, proceed to the Claw in a nearby room, who turns out to be Frankie Beckett. Resolve the situation with Beckett, either by killing Frankie or convincing Beckett to spare him. Afterwards, return to the C.A.M.P. and talk with Beckett to complete the quest.

Behind the scenes
"Thicker than water" is a shortened version of the phrase "The blood of the covenant is thicker than the water of the womb." The blood of the covenant refers to bonds made by choice such as friendships while water of the womb refers to family relationships. The quest title refers to the fact that Beckett has made the choice that he will support his allies (i.e. the Vault Dweller and Ronny) over his brother.

Bugs

 * Beckett will fail to recognize that Frankie was spared after returning to one's C.A.M.P.

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