What's the scariest game you've ever played? I'm gonna say Project Zero, I played it again very recently and even though it's around 12-13 years old now it's still unbelievably unnerving.
Basically you play as this girl who is investigating a haunted mansion to find her missing brother. The only way to defend yourself is by using a camera that captures ghosts when you take their picture but the thing is a lot of the ghosts in the game won't attack you, they'll just appear in unlikely places to scare the **** out of you.