The Big Dig

The Big Dig is a side quest in Fallout 4.

Detailed walkthrough
The player character receives the quest after talking to a woman named Bobbi No-Nose in a backstreet at Goodneighbor. She says that she's planning on breaking into the Diamond City strongroom located under the mayor's office. At first the player character needs to go down in The Dig, a tunnel starting at Bobbi's house basement and help diggers fight mirelurks. After, she asks the player character to meet her in Diamond City and help free another member of the heist team, Mel.

Freeing Mel can take one of several forms: bribing the guard nearest to him, pickpocketing a key, setting the protectron behind him loose to kill the guards, or passing a moderate or hard persuasion check. It may be difficult to find the right guard as there are no distinguishing characteristics. Breaking him out with lockpicking will likely result in security becoming hostile. To the left of the cell is the office, inside steal the key from the desk, then sneak to the right side of the cell. When the guards are not looking unlock the cell with the key and meet Mel outside. If the guards spot you they will become hostile.

Finally, the team goes into the tunnel, traveling through old metro stations and basements filled with feral ghouls and more mirelurks. Mel will frequently express his doubts about the tunnel actually leading to Diamond City, as the team is heading too far South. After they make it to a cavity underneath the strongroom and blow the ceiling with the help of Sonya, a modified eyebot, it is revealed that it's not Diamond City's strongroom but a secluded storage room owned by John Hancock, Goodneighbor's mayor.

The room is filled with the mayor's henchmen. The player character should be subsequently given the choice to persuade Bobbi to leave and surrender, kill all the guards and stay with Bobbi, or betray Bobbi and kill her for the mayor instead; if the player character enters the room wearing headwear incorporating a targeting hud, Fahrenheit and her man will be automatically hostile, forcing the PC to kill them to continue. If you still have the headwear on after finishing the quest by getting paid, Bobbi will also immediately turn hostile and attack.

If the player character persuades Bobbi to leave or betray her, Fahrenheit will reward them with a legendary minigun with incendiary bullets (+15 fire damage); Ashmaker. Additionally, John Hancock will become available as a follower.

Even if the player character kills Fahrenheit and sides with Bobbi, Ashmaker can be looted from her corpse and John Hancock will still be available as a follower after finishing Hancock's follow up quest of killing Bobbi.

Behind the scenes

 * The quest name is a reference to The Big Dig, a massive public works infrastructure project constructed in Boston that involved the building of various highway tunnels under the Downtown area.
 * Four wooden blocks spelling the name "Gary" in reference to Vault 108's infamous Gary clones is found in the subway car at the metro station.

Bugs
Раскопки (квест)