Across my time with the 360 there have been several achievements I have tried to go for but have been unable to obtain even though I did what was required. For example there are 2 achievements in Driver San Francisco which I can't get. There's the one for driving down Lombard Street while staying above 20mph and not hitting anything. I tried that over and over, flawlessly managing it at least a dozen times, yet the game won't give me the achievement for it. There's also one for escaping from the police while driving a truck. I also performed this several times with nothing to show for it. Also a very long time ago I managed to finish The Darkness on hard difficulty without getting anything to show for it. Now I'm no achievement whore, I've only got 100% on 2 games out of my library, both of which aren't hard to get (Oblivion and NFS MW), but I feel really cheated when I do something for which I'm promised a reward which I never get. Has anyone else had experiences like this? Or am I being an idiot and missing something I'm doing blatantly wrong on those particular achievements?