u/Calm-Finger-8092

First of all, the following message contains multiple spoilers regarding the whole game.

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Hello, i'm progressing quite well on my journey, but i think i would need some tips to be able to solve some mysteries. I'm afraid to look at websites and have a direct solution, instead of hints on my issues.

To understand where I am:

- I went to the Room 46 multiple times

- I got 6 sanctum keys (room 46, vault, music room, clock tower, reservoir, safehouse)

- I got a ~50 daily allowance and ~10 upgrade disks, bought all books

- I unlocked the grotto and got throne room blackprint

- I unlocked the satellite

- I solved Room 8

- I "unlocked" the tunnel area (removed ~10 crates, though don't know how many to remove in total)

- I think i broke mostly all walls and lighten all candles

- Solved the chess puzzle in the Precipice

- I've unlocked Clock tower, Kennel, Dovecote, Classroom (these were interesting, so I guess I should unlock the others)

- I got 2 passports from the Vault, don't know how many I should unlock

- Writing this message I remember I didn't watch all camera videos in Security

Now the goals and unsolved mysteries I'm trying to check:

- I solved the first 4 sanctum doors, i unlocked the 5th and 6th but i don't have any other information apart the location of these realms. So i miss 2 information and 2 sanctum keys + their info (I know one may be in the throne room, but don't know about last one "last key is waiting behind the last door of eight", I mean the sanctum key can't be behind a sanctum door)

- I've unlocked Blackbridge Grotto and found the 3 microships, still I didn't manage to find a password for the terminal ("RevaD" isn't working), plus i have the Note "1 100" or "I IOO"

- I got the blackprint for Throne Room for ~10 days now, but never saw it proposed, maybe I need to find the conditions for it

- In the breakable wall in the Precipice, there's a puzzle about CASTLE, i got no clue about it

- I got 5 red envelopes (Boudoir, Study, Office, Vault, Shelter), as I got the 7th and last I guess i got 5 out of 7 then (7th seems to be the last one, but in this game everything is about 8...)

- There is a letter from Clara near her tomb, a coded message (i have no clue for this yet)

- There is a map of the realms in Room 46, I think I need to read all letters in the sanctum before to understand his journey

- classrooms puzzles (didn't really try to draft the 8 yet in fact)

- In the book A new clue, I got too much questions about some details which may be hints, I don't really know if everything is really useful or not. I can list them all: "route 8" sign, "tanner to fork" sign, the 4 books with titles, some writings on a blackboard like Draft the sixes = Shifted extras = The fixed stars, "each" sign, "record" sign, all texts in the purple book about colors and dead end, a list of suspects etc.

- I don't know what to do of the plans of the train metro and Royal museum from the Safehouse

- I got a letter "Hundred Bells" signed Sandy Heights 5pm

- I need 8 trophies to unlock blue tents in the gift shop, don't know yet what it's about

- In the Kennel, there is a poster with "CAT"

- In the Cloister there are letters carved behind the statue

I would say I'm rather interested in what helps in progressing on the "main" story, rather than solving minor puzzles (I mean minor for things just on purpose of giving players some additional content or enhancing our stuff).

Thanks for your help, and I surely forgot things so ask me if you need other details!