Guides / Fallout 4

Vault 88

Fallout 4 guide · exploring the underground construction site
← All areas in this guide

Vault 88 is an unfinished subterranean vault introduced in the Vault-Tec Workshop add-on, entered through Quincy Quarries. After clearing out raiders and helping Overseer Barstow, the Sole Survivor unlocks the workshop to clear massive cave-ins and construct a custom vault settlement. Exploring the expansive sector tunnels allows you to secure the perimeter against native creatures, connect power, and conduct experimental prototype tests on dwellers.

Related quests: A Model Citizen

Items

0/2

Secrets

0/1

Enemies

Feral Ghoul
Weak to Head

Found infesting the main entrance hub and reactor area, including Overseer Barstow's former staff.

Radscorpion
Weak to Combat Inhibitor

Burrows out from the ground in the unexcavated tunnel sectors.

Mirelurk
Weak to Face or combat inhibitor

Inhabits the damp underground water cavern sector along with a Mirelurk Queen.

Sentry Bot
Weak to Fusion cores on backSteal / drop Fusion Core

A dormant prototype security bot stationed in the deeper unpowered tunnel paths.

Shops and people

  • Overseer Barstow: Provides the initial Vault-Tec experiment questline and rewards the Vault-Tec Legend suit upon completion

Tips

  • Scrap the limestone wall blockages within workshop mode to open up passages into the North, East, and South expansion sectors.
  • You must find and insert the specific Sector Control Board into the sub-workshops before you can build or scrap in those outlying cavern zones.
  • The main cavern features an enormous natural water pool in the East Sector where high-capacity industrial water purifiers can be placed.

Stuck somewhere in Fallout 4?

Quest Compendium sees your screen while you play: ask about exactly where you are, and keep this guide open right beside your game.

Get live help while you play

Report a mistake