A very quick walkthrough as at least part of the hints may not be around any more in the future (reliant on imgur)
 
 

Unlocking the save

The safe is the ligher-colored sliding door on the shelf.
 
 
Around the room are 5 books of different colors: Green and turquoise on the bookshelf, yellow in a drawer below it, violet on the table, blue below the PC screen.
 
 
Notice the painting on the wall with the different colored stripes.
 
 
Book number in the position of the stripe is the code needed for the save.
 
Enter the wrong code first for an achievement.
 
Note that a 6 can also be a 9.
 
 
The code is 9623
 
 
 

Turning on the PC

with the remote from the safe, you can start up the TV. It displays a QR code which leads to https://imgur.com/glzEcqt – [imgur.com] 
 
 

 
 
You want to turn on the computer, so take a note of which switches connect the computer (screen with tower) to the battery. Those are the numbers 1, 4, 5 and 6
 
 
Besides the fire place is a grey panel on the wall, interact with it to reveal a series of switches.
 
Flip only the switches connecting the battery to the pc and press the red button.
 
 
Go to the PC and press the big white button on the tower to turn it on.
 
 
 

‘Unlocking’ the sofa

The unlocked computer will play a series of morse signals when you interact with it.
 
Those are ··– ···– —-·.
 
Translate them using the handy morse alphabet to get the code for the sofa, 2396
 
Make sure to interact with it again after unlocking.
 
 
 

Getting through the gate

Once in the cellar, the gate won’t budge and the panel to the right of it tells you you didn’t pass identification.
 
Grab the crowbar to the left of the gate behind the wooden trash and return back the way you came.
 
At the stairs, look for the illuminated face.
 
Grab the mask and return back to the scanner, use it and use the gate.
 
 
 

Getting in the hidden room

On the left side of the broken minecart tracks hangs a chain you can pull. doing so will reveal a hidden section at the end of the tracks that you can jump up to. Hidden there is yet another password panel.
 
On the minecart tracks, nearer where you came from, you’ll notice some carved in letters.
 
In he order from where you came they are EPECSA
 
Now you have to order them in a way that makes sense, ESCAPE, to get the code for the hidden panel.
 
After entering it, return to the end of the minecart tracks use the two big stone slabs right next to it to reveal a hidden passage
 
 
 

Can you open the save?

I don’t think so. it has a code panel but I found no hints for it. Write a comment if you know a way
 
 

 
 
Here we come to an end for the Walkthrough – The Hidden Room guide. I hope this guide has helped you with your gameplay. If you have something to add to this guide or believe we forgot some information to add, please let us know via comment! We check each comment manually by approving them!