Here is my 100% Achievement guide for Deliver Us The Moon!
Very close at the beginning of the game.
After you climb the lift and enter the dark building for the first time (This is where you get told to put your flashlight on).
Get a code from behind the desk to enter the locked door.
Once through there, you have to go through a few rooms on a pretty linear path.
In the very back room on the right hand side, you will see a small golden globe.
Simply press and spam
on it until it unlocks. It may take around 5-10 seconds or so.
Go to 8:25 in the video to see where and how this unlocks.
Hope This Helps!