First, the positives. White-knuckled plot, first rate graphics, atmosphere, and audio. A few jumpscares, but doesn't go overboard with those. Some people might consider that last one a negative, but I'm not crazy about jumpscares. I play these games to solve puzzles, find hidden objects, and discover clues to mysteries in a scary setting. For me, that's difficult to do when I always have to worry about being attacked by a demon. Now, for the negatives. First, hidden objects are somewhat redundant. Usually keys or papers. Objects could stand a bit more creativity. Second, certain parts of this game are difficult to operate with a mouse and keyboard alone, even with a gaming mouse. Best to spring for a USB gaming console with a game like this and they're not cheap. That brings me to the biggest negative of all. Certain parts of the game require the hand-eye coordination of a surgeon and fighter pilot all in one. Someone like myself, who has dexterity issues may find these parts unwinnable. I have found ways to make some of them winnable through ingenuity, but I'm thinking specifically of one particular phase where you have to escape a demon by running into a safe area which requires you to crouch down in order to enter. Since you can't run and crouch at the same time (at least I haven't found a way to do that) you have to hold down the W and left-shift keys to run, then when you reach the safe room, you have to quickly remove your finger from the shift key and press the left-ctrl key, all while keeping your finger on the W key. Then, after you enter, assuming you get that far, you have to quickly turn around and shut the door. You have less than a second to crouch, enter, turn, and shut the door. I've checked out several walkthroughs on youtube and from what I've seen, all the players use gaming consoles. That's why I recommend those over the standard mouse/keyboard combo for this game.
This could and would be a great game; very challenging and intriguing. But it has bugs, some of which are serious. Yesterday, I managed to open the main trunk in the library and hit what I thought was a mother lode. But I couldn't collect any of it right then because my inventory was already full. So I had to go back to a safe room to drop some stuff off. When I got back to the library to pick up the stuff in the trunk, I found the game would no longer give me the option. Apparently, it thinks I already picked it up, which I hadn't. I may have to start over again because I'm running low on oil. Once you run out of lamp oil, you're screwed.