Vault 81 (quest)

Vault 81 is a side quest in Fallout 4.

Detailed walkthrough
When the Sole Survivor arrives at Vault 81, they proceed to connect their Pip-Boy to the entrance button in an attempt to open the vault doors; however, they are instead greeted by the present occupants of the vault, who are descendants of the original members of Vault 81. Vault 81 is one of the few that hasn't been captured or overthrown, and remains orderly and secure for the residents.

The Survivor is told by the overseer of Vault 81 that if they want to enter their vault, they need to bring three fusion cores as means of payment. Alternatively, the Survivor may pass a difficult speech check.

If the Survivor chooses to part with the cores, they will be compensated with 100 bottlecaps by the overseer, and will be allowed to enter the vault. Overseer Gwen will welcome them, and they may trade and interact with the residents of Vault 81. Overseer Gwen explains to the Survivor that although the vault can provide a lot of resources for themselves, sometimes they require outside materials to maintain the vault's stability.

Bugs

 * When you pass the persuasion check there is a chance that the door used to head deeper into the vault will not open and remain inaccessible. There is no currently found fix for the issue.
 * When you enter the vault, McNamara will finish her conversation with Calvin and then just look at you. If you try to interact with her she will just stare at you. Saving and reloading the game does not appear to solve this issue. It may be caused by dropping your cores after entering the vault but before talking to McNamara; picking them up again resolves the issue in this case.

Убежище 81 (квест) Сховище 81 (квест)