Brand new from the makers of the Penumbra series, Amnesia is fucking creepy ass game. The whole game is real dark and the longer you stay in the dark, the further your sanity leaves you and you begin to lose control. You are armed only with a lantern and other things you find. Other than attacking creatures, you hide and try to stay away from them as much as possible. $19.99. Buy. Good if you like puzzle scary/horror games. If you don't know, try the demo.
Some screenshots from my game experience: