How to find and open Hidden Room in Deer & Boy

Quick guide to unlock the door to the Hidden Room and earn the following Trophies/Achievements:

Hidden room

Step 1: Reach the Checkpoint 23

Head to the section covered in black matter with a lever that has no power.

Step 2: Restore Power

Clear the black matter using the deer, then use the wooden box to access the vents. Head right until you reach a room with a power registry and a second lever.

Use the following lever combinations, in this order:

1. Restore power: Down → Up → Down → Down
2. Door lock #1: Down → Down → Down → Up
3. Door lock #2: Up → Down → Down → Up
4. Door lock #3: Up → Down → Down → Up

Step 3: Trigger the Trophy

Approach the glass and let the people inside see you — the trophy/achievement will pop automatically.