Vault 75 (quest)

Vault 75 is a side quest in Fallout 4 which is triggered when exploring Malden Middle School.

Detailed walkthrough
In the basement of the Malden Middle School, go through the vault door and enter the elevator going down. Keep going a one way direction until encountering a door to the lab on the right-hand side that needs an access card to be opened.

At the end of the hallway, you will get to the atrium. Go forward and turn right into a locker room to see another hallway and inaccessible door to the lab from the other side. Go left, down the stairs and left towards a diner. Go into it and upstairs and get the access card from the tool case.

Make your way back to the second blue door and open it with the access card. The door in front of you leads to the first blue door, it's just around the corner, left.

Go up the stairs and you will find yourself in a room going three different ways; go forward. Kill the Gunners and get the admin access card from one of them. Now you should be in a room with a view to the diner you've been to previously. A bobblehead is on one of the tables.

Backtrack to the lab room and use the admin access card on the door. Climb up few stairs and you should be in the overseer's room, activate the terminal on his desk and complete the quest.

When you enter the overseer's room, on your right is his bedroom with a Grognak comic on the bed.

Bugs

 * This quest may not be activated upon discovering Vault 75, or examining the swipe card access lock. There is no certain way to fix this besides either using console to give yourself the key cards or taking advantage of console commands to get to the bobblehead. Proceeding down into the vault, then doubling back into the elevator from the vault side may fix this issue.
 * If the quest gets stuck you can use the console command to fix it using a stage ID.
 * Even after completely exploring and clearing out the vault and completing the quest, you may not be able to remove the Vault 75 key items from your inventory, as they will still be flagged as active quest items.

Убежище 75 (квест) Сховище 75 (квест)