If you haven't played Shadow Complex yet....what the fuck is wrong with you? If you don't have a 360, that's understandable. If you do and still don't have it, just get rid of your 360 now. It's a great homage to two of the most amazing games of the 90's; Super Metroid and Castlevania: Symphony of the Night.
And it's only $10, down from the original $15. Do it. Now.