After playing for 12 hours, my 360 froze while Hitman was saving. Upon restarting my xbox, all of my save game data had been deleted. The only thing still there were the xbox achievements (....yay....?). As far as the game was concerned, I had never played it before. No work arounds that I know of, and the internet says people are having this issue across platforms. Sometimes an hour in, sometimes 12 (as in my case).
So, I dunno. Buyer's Beware? Pretty shitty way to end my night. Sigh.