Ok, now listen cuz I'm only gonna say this once. The camera in the study on level 12 is easy to get by.



Get in the doorway and look up so you can see the camera then once the camera is facing to the left you stick close to the wall and go through the doors.



In the room you have to stop cuz there is another camera outside the door leading to the stairs.



Squat down and wait till that camera is looking to the right and get up the stairs. After that there will be one more camera.



Wait till it is facing left then get under it and wait till it is facing away from the door and you've won. (listen to me I'v beat the game on hard 5 times w/o cheats)