If you like retro gaming horror, "I Have No Mouth And I Must Scream" is the horror title for you. The game's strength is not in its admittedly dated (but not horrible) graphics but is in Harlan Ellison's 1968 Hugo Award-winning short story behind the game. Well worth a playthrough for the fan of retro-gaming and classic science fiction horror.

I've always been a fan of the original BloodRayne. Years ago, I picked up a used copy of the GameCube version for only a few dollars, and it wound up being one of my favorite games, more than worth what I paid for it.

BloodRayne isn't a particularly frightening game, but it's wall-to-wall gore. When faced with an enemy, you have a number of options for dealing with them: you can suck their blood while they give panicked cries for help ("Get her off! Get her off me!"); harpoon them through the chest, then suck their blood; hack them into bloody pieces with the blades on your wrists; blast them apart with grenades, or dynamite, or rocket launchers; or blow their heads off with pistols, rifles, and machine guns.

There's so much variety packed into a relatively short game. You fight zombies. Spider-mutants. Demonic parasites. Other vampires. Nazis. Jetpack Nazis. You pilot a Nazi mech against a team of other Nazi mechs while Rayne taunts them over the radio the entire time. And all the while, you get to enjoy the dulcet tones of Laura Bailey (Lust in Fullmetal Alchemist, among other roles) as Rayne, alternately mocking and flirting with her victims ("Tell me you love me, baby.").

The game isn't without its flaws. The plot is mostly nonsense (you could cut the entire first act of the game and lose nothing of importance), the middle section dealing with the Daemonites is too long, some of the levels are difficult to navigate, and many of the boss battles have gimmicky mechanics that can be frustrating. But you forgive all that when you get to slice off a Nazi general's arm and watch his health bar drain to nothing while he runs around screaming and gradually bleeds out.

BloodRayne is a great mix of action, horror, and cheese, and I would heartily recommend that anyone who has never played it give it a try. I keep meaning to pick up a digital copy on GOG to replace my old GameCube disc.

Gonna have to go with the already mentioned Alien Isolation.

The incredible hard to evade Xenomorph AI, along with its great directional sound design of it stomping around looking for you, and is even better using headphones, made for one one of the few horror games i've played that I genuinely found scary.

System Shock 2, not just an excellent horror game but one of the best games of all time. After I completed it for the first time, I started a second playthrough with a different character type.

I would say Dying Light for its hours of heart pondering horror and jump scares when you least expect it and unsettling screams during the night.

'Also, one of my favourite games with more than enough gameplay to get lost in, as I found it hard to stop playing and, I hope we get Dying light Two sometime in the future.

Hello.

Silent Hill 2

Another vote for SOMA. It's just one of those games that, although lacks replayability, stick with for a long time. Makes you think.

F.E.A.R., it combines both FPS shooter and horror without compromising on either.

Outlast.

On my first scare, I screamed so loud that my wife, which was standing next to me, fell off the chair.

Dying Light is not only an aaaamazing horror game, but one of my favorite games of all time.

I Have No Mouth And I Must Scream is a must!

Resident Evil 3: Nemesis on PS1, never gets old... :)

I'd have to go with SOMA too. Simply put the best horror game and one of the best scifi games ever.
It's the kind of existential horror that you feel inside of you. The one that you can't escape from, because it arises in your own thoughts. It haunts you long after the game is finished. This is the game that sticks with you.

Silence of the Sleep (not currently available on GOG). Great indie horror experience, minus the maze segment. :/

Rule of Rose on the ps2. Make sure it is a brand new sealed copy if you want the full horror experience.

But for a game on GOG, I would recommend the Dead Money DLC in Fallout: New Vegas Ultimate Edition.