Timesplitters on Acid

That's what Prey is. I did the entire Normal difficulty in one sitting, and it's a fantastic game. Easily one of the 5 best on the 360, and possibly the best FPS I've ever played that hasn't come from Valve. I'm going to knock out the multiplayer achievements in short order, as well as run through it again on Cherokee difficulty. I should be done by the end of the week.