Wait a minute. I heard that you needed a copy of Alice: Madness Returns in your disc tray in order to be able to play the original downloaded game. But if you can purchase it seperately does that mean that you can play it without having Alice: Madness Returns in the tray? Or does this $10 just refer to people who are buying it because their copy of Alice: Madness Returns is used and thus the disc still needs to be in your console tray?