My personal top 10 scariest online games. What's yours? :)
 

My top 10 online games:

1. Cellar door
2. The house 2
3. The house 1
4. exmortis 2
5. exmortis
6. goliath the soothsayer
7. purgatorium (I think, it just surprised me so much and was so unexpected)
8. Do you have a grudge
9. silent hill room 304
10. Ghost escape 2: the cabin (No jumpscares just tension building)

I also really like:
The last stand 1 and 2
13 days in hell 1 and 2
torture game (I know... I'm a horrible person :D

Oh, by the way you can play them all on my website in fullscreen (No ads... promise ;) ) http://www.horror2night.com/point-and-click.html

So what are your favorite horror games online?