Outlast

You'll feel helpless and hunted from all sides. You'll feel that all you have to look forward to is suffering and death. You'll feel trapped and stalked by people who want to rip off your skin and rape your eyeballs. God, this game is amazing.

Helpless victim simulator doesn't make it a good Horror game. Navigating through the dark with a camera's nightvision and occasional scare jumps doesn't make it a good Horror game either. Being unarmed, helpless victim doesn't make it a good game at all. It only makes it a frustrating experience overall. Protagonist can't take a single bat in order to defend himself. Games like this need weapons, and with an atmosphere like this it could build up the tension to add more to the overall experience. Add to that limited ammo resources, and that would make things a lot more engaging. Playing game for hours with a camera in the hand is so boring. Oh, but the environment provides a plenty of the batteries specifically for the protagonist's camera model. How convenient. Games like The Suffering, The Suffering - Ties That Bind and Half-Life allow the use of weapons, and do not lose quality horror experience. Heck, The Whistleblower DLC has a ghost as the enemy, which insta-killed me. Developers should know by now that ghost that are not of solid matter should not be featured in games like these. Especially if they insta-kill the player. It is a game over. There is no win against such types of the enemies. No storyline can justify it. It totally breaks the immersion to have an enemy like that in a Horror game, where the protagonist enters experimental laboratories and similar facilites. This is not the ARPG like Titan Quest - Anniversary Edition, Grim Dawn or Torchlight, where a ghost is nothing more than another enemy type. And no, playing it with the lights switched off, being alone in a room, and with the headphones on doesn't make it any better. Avoid it. Try out The Suffering, The Suffering - Ties That Bind and Half-Life instead. Those are the real Horror games.

This is one of the scariest games currently available on GOG and it's currently the highest rated horror game on Steam. The game is very simple and yet it has the atmosphere and jump scares horror fans love. This is a game that will make you feel like someone will jump out and scare you, those games are extremely terrifying. I should warn that this game is extremely violent and shouldn't be played by any child because it will give your kids nightmares. It could just as easily give an adult nightmares. This game really pushed the limits as to how violent a game can get, I'm quite surprised it didn't get an Adults Only rating from the ESRB. If you're looking for a game to scare you s*itless, this is the game for you. I highly recommend it if you are a horror fan like me.

This is just a warning, the DRM-Free Mac and Linux versions are on the Humble Store, gog doesn't have those version yet, for some reason. Otherwise, great game.

This game is highly recommended by a gamer like myself, tired of today's mainstream-focused "Horror" games (Dead Space etc). First of all. YOU CAN SEE YOUR FEET. This adds an amazing feel the First-Person style of games that I personally wish more games would have. It makes you feel as you're in the game yourself, this is a very important point in horror. Placing you in the uncomfortable situations that occur. Secondly, It's linear. I like it. Today a lot of games feel the need to have "many options" in the way a game progresses, but I often feel they lose focus / track. Since this is a linear storydriven horror game, you never feel lost for too long before you're on the right path. Third: No weapons. This in itself adds to a tremendous feeling of being alone and helpless in the midst of the craziness that endures around you, no spoilers, though. :) - TLDR; If you like horror games that actually can 100% be classified as HORROR, you are going to WANT to play this game. Get going! I Heartily recommend it.