13 days in helll
Shoot the incoming minions of hell. Shoot them in the head to save bullets. Not as good as the sequal but still worth trying out if you haven't.
So go right ahead and save the world from axemenzombies or whatever.
(GOD I wish there would be a game where you dominated the world as the master of darkness. Like Damien, just a free and online version)
Scariness level: 1/5
Not scary but disturbing to some