Hi I did found Penumbra and ... that part and the ending were ... weird to put lightly. But it was still fun to try to solve that secret. However, I am still missing two secrets and what's bugging is that pretty sure where they are but can't find a way in. I also seem to be missing the 11th file, any tipp on that ?
Edit : I only need to get into one secret which i think is near the hydraulic press. Try cobinaisons with the valve but it doesn't seem to unlock.