Let me get something straight: I don't get scared easily. I've played the first two Resident Evil games without breaking a sweat, I watch Hellraiser and The Exorcist alone at night and think nothing of it.
Then there was Silent Hill... This game isn't just another random bloody horror game like the RE series, it's genuinely disturbing, and let me tell you, it scared me a lot.
It begins with a typical cliche... Harry Mason is driving down a road at night with his daughter, going to visit this little out-of-the-way resort town, Silent Hill. A girl steps in front of his car, he swerves to avoid her, and ends up crashing. From here on, strange things start to happen... Harry wakes up and finds his daughter missing, and stumbling through the mist, he sees her disappearing down a dark alley... I won't say anymore, I'll let you find out what happens.
Not only is this game very dark and scary, it's disturbing at a psychological level. It doesn't use big monsters to frighten you; after playing for only a few minutes, the slightest rustle can make you flee in terror. The plot isn't thrown in your face like other games, you have to think, and you're never really told what's going on - perhaps Harry is in a coma and dreaming all this, or maybe he died and went to Hell. The air of mystery and suspense keeps you hooked until the end, and it'll keep you coming back for more.
And I'll tell you this: After playing Silent Hill, those old WW2 air-raid sirens will never sound the same again...