Dead space and Resident evil. First time you play them you get chills up and down your spine as you enter dark rooms, walk through bloody hallways, caught in tight spaces, and more. Theres more different horror titles out there but these two games are as far as I go with horror titles. Other horror games, like silent hill and fatal frame, are way to creepy and scary for me to play alone. I didn't want to play Bio-shock after the scene where you watch someone get killed while you were sitting in some glass elevator. Even Half-life 2 had its creepy/scary moments with the G-man sightings and when your going through Ravenholm. I regret playing some horror games but yet I still play them today.
I wanna advance ahead of the game, but I'm stuck patrolling this darn platform!!!
Penumbra 2 is pretty scary. Nice combination of puzzles and eerie atmospheres. The monsters are pretty creepy as well. It's nice that the game let's you interact with the environment. I highly recommend it.