Mall
Remarks:
The Offices is a Raider nest, so be careful.
Be careful around the passage to the outside on the east side, as there are many Raiders there.
Ingvar often spawns in the Bookstore.
Trivia:
In the western Scavenger hideout outside, there is a corpse lying around. Searching it yields about as much money as a register.
It feels like the kind of attention to detail you'd see in Skyrim.
Mall: Outside
Outskirts
Remarks:
DETECTORs will swarm you when you get close, but they won't become hostile unless you attack them.
The keys required to access the underground Greytech Lab are 2× Greytech Lab Keys, 1× Laboratory Keycard, and 1× Research Lab Keycard.
The lasers in the underground Greytech Lab will instantly kill you on contact. Disable them in the room on the left that the laser passes through before proceeding.
The Operators in the underground Greytech Lab will relentlessly chase you once they spot you, so don't let your guard down even after putting some distance between you.
The Office Guards also have significantly increased detection range.
Trivia:
In the underground Greytech Lab, there is the corpse of a poor Raider whose head was burned off by the lasers.
The Greytech Lab basement map image is a fan-made one by the creator, and it looks really tacky.
Outskirts: Grey Tech Lab Basement