I've been checking a guide as I play through, since the game is mostly puzzles or navigation. Its saved me some ammo on bosses since I have an idea what to do, mostly from reading text in the guides. For the Pyramid Head rematch walking backwards slowly was all I had to do. Also fought some other asshole, Eddie, but it was mostly standing still with the flashlight off, and taking shots with the rifle when I spotted him. Stay tuned !!