This is really a great horror game and as someone who regularly views a lot of horror movies and violent images and stuff, this one has managed to keep me interested and I'm still playing it again now.
It's not the gore or the actual monster that made me feel uncomfortable. It's the atmosphere, the sound, and the thought that maybe, just a little ahead of me where it's very dark, one of those things that I don't want to see would bump into me.
For example, the water monster didn't scare me. What I was more worried about was the time limit on the gate that's been opened by the lever. The feeling of rush and having to do each movement precisely was what put pressure. Jumping from box to box in order to avoid the water, and then picking up another book to distract the water monster with, and then quickly shifting your focus back to jumping from box to box, and finally getting through that gate.
Then the next part was just as bad. For first timers in this area, the obvious choice of action is to throw pieces of dismembered limbs far away so the water monster will eat them, giving you a chance to hurry to the gate and turn the valve. The scary thing is, the monster eats up those things quite fast, leaving you a short amount of time to turn the valve. The limbs that you have near the gate is also limited to three, so that means three tries for you to open the gate in a way where you could crouch and get through it. The pressure of listening to the monster getting near you and hopping back on a box so that you can throw another limb is high. The gate opens too slowly. The reason why this section is very disturbing is that you just survived the first part of being chased by a water monster with a time limited gate, and now you have to actually jump into the water to be able to turn the valve.
Anyway I found a safer way of solving this section which I call the "Portable Floor" solution lol!
So yeah, this game is really bad for those with heart conditions or people who are too emotionally affected. The fear in this game mostly comes from your own mind. The sounds and sights in the game are just part of the environment, but your mind amplifies them to be a lot scarier than they really are. Monster encounters are actually very far from each other, and it's mostly an exploration and puzzle solving game.
I really hope we wouldn't hear a case where a person died because of playing this game since he suffered a heart attack. With this game, that sad situation can be a reality.
I love this game hehehe