Amnesia: The Dark Descent (75% Off)
Price: $4.99 (75% Off)
Not only will Amnesia: The Dark Descent scare the crap out of you, it'll remind you why not every game has to be about machismo and empowerment. With a sequel on the way and full Mac support, there's little reason not to get yourself versed with this fantastic survival-horror game. Of course, that's implying you're brave enough to face it down in the dark.