Scary Games

Not a game so much as a creepy wait and see what happens type thing. Turn lights off and sound up for full effect. Well done, but I wish it was longer and more of an actual game.

The House - a bit of an oldie, but a goodie.

I jumped in the bathroom.

Also check out NFH Propaganda and any of these.

For something a bit less creepy, 99 Rooms is a good bet.