06-09-2010, 04:41 PM
I was quite disappointed to find this out after I beat the game. I spent a good 2 hours total on the 4 challenges within story mode while trying to get a gold in each. However once challenge mode unlocks you will have to do them all over. Granted I spent so much time on them that I can now breeze through them all. This is just an FYI. It doesn't matter what medal you get while in story mode. It won't count towards the achv.