Game's great.. it's available in the XBox Live Marketplace on-line... in the Arcade section.
Very dark, very atmospheric, and very unique game. No color.. no music (except when.. well.. you'll see..
), and very engrossing. Very easy control scheme also.
Some nice achievements and unlockables, if you're into that sort of thing (I could care less, but I guess you can "unlock" a Shadow pet for your avatar, or something like that).
Put about an hour into it and I'm only about 20% done... game saves automatically wherever you leave off.
Addicting.. should be recording, playing this instead.
10/10.