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Fallout 4 (FO4)

Vault 81 Location and Walkthrough

Add to Watchlist

★ Best Starting Stats | How to Level Up Fast
☆ Best Ending | What is the Max Level?
★ Best Perks | Best Companion Perks
☆ Best Side Quests | Missables
★ Power Armor Locations | Fusion Core Locations

Fallout 4 - Vault 81

Vault 81 is a Side Quest in Fallout 4 (FO4). Read on for a full Vault 81 walkthrough and learn Vault 81's location and rewards.

◀ Previous Quest Next Quest ▶
- Here, Kitty Kitty

List of Contents

Vault 81 Location

West of Diamond City

Map View
Fallout 4 - Vault 81 Map
World View
Fallout 4 - Cave Entrance Vault 81

Vault 81 is located west of Diamond City. The entrance features a cave-like opening marked with a Restricted Area sign above.

Vault 81 Walkthrough

  1. Open the Vault With Your Pip-Boy
  2. Find 3 Fusion Cores
  3. Submit the Fusion Cores

Open the Vault With Your Pip-Boy

Fallout 4 - Vault Door Controls

Attempt to open Vault 81 and connect your Pip-Boy, you will soon realize that you won't be able to. Officer Edwards and Overseer McNamara will then be talking to you via the intercom.

Overseer McNamara will task you to get 3 Fusion Cores in order to get inside. This is where the quest begins.

Finish the Quest Here Immediately

Fallout 4 - Help A Vault Dweller

If you have a high enough Charisma, you can pick the difficult dialogue option, Help A Vault Dweller, to complete the quest immediately and get inside Vault 81 now.

Best Charisma Perks

Find 3 Fusion Cores

Fallout 4 - Fusion Core

Fusion Cores are found scattered throughout the wastelands. They can also be seen inside buildings attached to a generator, powering up the facility. Fusion Cores are also attached on the back of Power Armors.

Find 3 of these and report back to the Vault 81 intercom.

All Fusion Core Locations Map

Get Fusion Core via Console Command on PC

Fallout 4 - Open Console Command

Alternatively, you can get 3 Fusion Cores instantly via Console Command. Press the tilde (~) key to open the console command and type the following code:

player.additem 00075fe4 3

All IDs and Item Codes

Submit the Fusion Cores

Fallout 4 - Report Back

Once collected, you can submit the required Fusion Cores back to Overseer McNamara and the Vault door will finally open.

Talk to Overseer McNamara to give the cores and finish the quest.

Vault 81 Quest Summary and Rewards

Vault 81 Rewards and Quest ID

Vault 81 Overview
Rewards ・ XP: 75+
・ Caps: 100
・ Access to Vault 81
Quest ID 000B8464

Fallout 4 Related Guides

Fallout 4 Side Quests

All Side Quests List and Best Side Quests

Side Quest Guides

Next-Gen Update Quests
When Pigs Fly Best of Three
Crucible Speak of the Devil
All Hallows' Eve Echoes of the Past
Pyromaniac -
Side Quests
The Silver Shroud The Devil's Due
The Big Dig The Memory Den
Public Knowledge Trouble Brewin’
Long Road Ahead Special Delivery
Pickman's Gift Human Error
Vault 81 Pull the Plug
Here, Kitty Kitty Hole in the Wall
Diamond City Blues Confidence Man
Cambridge Polymer Labs Order Up
Mystery Meat The Disappearing Act
Out in Left Field Vault 75
Dependency Here There Be Monsters
Curtain Call Painting the Town
Emogene Takes a Lover Short Stories
Banished from The Institute Last Voyage of the USS Constuitution

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