http://www.amnesiagame.com/From the creators of Penumbra comes...
You know what? I won't bother sticking a whole page's worth of text here this time.
Turn up the sound, fullscreen, enjoy:
http://www.youtube.com/watch?v=JEHPwAvrc_UUnfortunately, there's no HD version of the trailer since the PC used to make this trailer is at least five years old.
Chances are your PC will probably run the game better than this.