The game was bloody, scary, and a great time for people who like a little tactical fighting and survival horror in their first-person titles. That is, before the game decided that eating the save-game file was a great idea.
It's a feeling like ice water entering your veins. You restart the console, sign back into your profile, still, no luck. The game wants you to start from the beginning. All that time... just gone. What's even weirder is that the achievements are still there, as are the save game files themselves. Everything is, apparently, sitting happily on my hard drive. The game just refuses to let me begin where I left off. A quick search shows that other people around the Internet are having the same problem.
Note: Issue only confirmed on the 360 version.