The big door in the sewers

[bonipolo]

I'm not sure if they've asked this already but I can't figure out how to open the big door in the sewers, if it's even possible to open it.
So far I tried using Wilbur's Necronomicon book but it didn't work, tried the priest's book plus the talisman same result, re-read the log on the work bench and thought that maybe I just needed to have a headache, meaning low sanity, even got the depressed status but none of it worked.
Is it strength that I need or do I need to get the extreme depression status?

[SandStone]

You have to find the key. You'll find by going to the roof area of main building.
The clue is in the log on the work bench.

[bonipolo]

THANKS!

[bonipolo]

... I got the key but I don't seem to be able to use it, I got the quest but what should I do? tried talking to the guards on the roof but there wasn't any mention of the key

[bonipolo]

You seem to be mistaken, The boot key doesn't open the big archway door in the sewers but instead opens the double locked door in the pipe area... I guess I'll have to wait for the complete release.

[Inanegrain62]

Originally posted by SandStone:

You have to find the key. You'll find by going to the roof area of main building.
The clue is in the log on the work bench.

I see no obvious clues in the log unless the goal is to somehow faint in the sewers which would be tedious.

The key in the roof area is meant to unlock the door in the pipe area mentioned by the op as they've been curious about the cistern.

[BøgyKhaN]

also i did find a "heavy key" in operating room but i have no idea what exactly does the key opens up

[Tourie Amatta]

Originally posted by BogyKhaN:

also i did find a "heavy key" in operating room but i have no idea what exactly does the key opens up

That should open the door to the medicine room in the infirmary. Just outside of where you meet Beth.