I saw a way to go through the wall on a mauvaisvitrier stream, but I don't know how to perform it... How do you do it, and is it only possible on PC?

Re-posting my answer to your youtube comment on here:

Hi MagicMan101 !

It's quite difficult to explain so it might take a while, pay close attention :D

In The Occupation, the player doesn't have a 3D model, so when you sit in chairs the game simulates the motion of sitting down. And it works both ways. When you're sat down and stand up, the same 1st person camera mouvement is at play. So, as you might have guessed, the trick involves glitching the camera.

The game has a lean feature, that tilts the player camera one way or the other. You can also go up and down to hide under or peek over obstacles. So you can basically go in all directions while using the "lean" feature (that you activate while holding "space").

When sat on certain chairs (not all of them.. some of the chairs with more complex 3D models like with armrests and stuff don't work) you can activate the "lean" feature and lean a certain way. Keep the lean going and initiate the "Hold KEY to Stand Up" action. Do not actually stand up. You can start just spamming your binded key and the game will start displacing your camera towards the direction of your lean. I suppose the game is confused because you keep asking it to stand up (so it initiates the standing up camera mouvement) while actually not completing the action (so it has to move your camera back to where it supposes you were).

Using this trick, you can pretty much go anywhere out of bounds. The only downside is that you are still, at all times, considered to be sitting in the same chair you started your glitch from. So while you can interact with a lot of things you can not sit in another chair while glitching around. (sadly)

I hope that answered your questions