What's the secret of the boiler/technician room in the beginning village?
Do someone know what to do with this room ?
It's in the village from the beginning.
Edit: I found the solution alone, I didn't notice an hidden poster, during a perspective rotation.
Solution 1:
There is a code embedded in the posters on the wall.
Spoiler:
The numbered tetromino posters around the room correspond to the code's order.
E.g., above, #1 is ↑ and #5 is →.
The code is:
↑ RT ← A → LT ↓ RT