Vault 75 (quest)

Vault 75 is a side quest in Fallout 4 which is triggered when exploring the vault.

Quick walkthrough

 * 1) Head to the basement of Malden Middle School.
 * 2) Open the elevator.
 * 3) Find the lab access card on the Gunner Commander in the combat training area diner.
 * 4) In the Lab overlooking the combat training, find another Gunner with the admin access card.
 * 5) Make your way to the Admin Area and read the overseer's terminal to complete the quest.

Quest stages
If the quest gets stuck on PC you can use the console command to fix it using the stage ID's below
 * 0 - Not used
 * 100 - Explore Vault 75
 * 200 - Find Lab Access Card
 * 300 - Access laboratory area
 * 400 - Explore laboratory
 * 500 - Find Admin Access Card
 * 600 - Access admin area
 * 700 - Explore admin area
 * 800 - Completed the quest