I LOVE horror games! I used to play them all the time when I was younger, but now the new horror games just aren't scary anymore.
Anyways here are my favorites!
1. Siren, a horror game set in a cursed Japanese village called Hanuda where the water has turned to blood, the mountain village is trapped by a red sea, and the undead walk and behave like normal people but will violent kill any living person. You play as several different characters across a timeline of 3 days as they try to survive and figure out what is going on in the village. I found this game to be the scariest because unlike most horror games there are no health items and you can die in just one hit, the zombies are unkillable and very deadly, and the atmosphere was very realistic and creepy. The whole time you play the game you are given a feeling of utter despair like you really are trapped.
2. Haunting Ground, a horror game where you play as a teenage girl named Fiona who becomed trapped in a castle full os psychotic servants who want to murder her. Her only friend is a dog named Hewie who she rescues from a trap, and together they have to work to survive. This game the heroine wasn't a strong character. She could only fight by kicking, throwing things, and training her dog to fight for her, but most of the game she protects herself by hiding from enemies. I also loved how this game was done in the style of those old slasher movies, where Fiona's death was always done off screen and you only heard gruesome noises to imply her death.
3. Silent Hill 3, while I think all the Silent Hill games are scary, Silent Hill 3 was just my personal favorite. The mysterious town of Silent Hill is filled with so much evil and disturbing images. The monsters are very horrifying and deformed, and the heroes or heroines are always ordinary people who are somehow connected to the town and the events that are happening.
4. Fatal Frame, a horror game set in Japan with a very unique method of killing enemies: you take their photos. In Fatal Frame you play as a psychic Japanese girl who enters a cursed mansion to search for her missing brother, and her only weapon is an antique camera with the power to capture the souls of the dead. The mansion has had a long history of evil human sacrifaces, and somewhere it went wrong and caused everyone in the mansion to die and come back as evil spirits. Those who enter the mansion are said to never be seen again. The atmosphere in the game was very creepy, and the ghosts were realistic and horrifying. Plus each ghost had their own story of how they died.
5. Resident Evil 3: Nemesis, my favorite game in the series and the one I consider the most scary. You play as Jill Valentine from the first game who finds herself trapped in Raccoon City during a zombie outbreak and is fighting for survival. However a new mutant called Nemsis has been released in the city to assassinate the surviving STARS officers such as her.