Okay get ready for heartache, My girlfriend and I played through normal score mode in single player (even did 32 songs to exclude DLC), co-op, and even verses. We scored over 500k on 30 different songs and no achievement. Next we tried co-op on perfect mode and still no achievement. So after months of frustration we attempted perfect mode in single player. Well I just completed my 30th song over 500,000 points and what do ya know??? STILL NO ACHIEVEMENT. This was not an easy task by any means. I have like 20 songs completed in freeze mode but its the worst game mode I've ever played. Now the only hope left is that I have both DLC songs completed, so possibly they don't count towards the achievement, but I am unable to score high enough on any other song. There are 3 songs in the game that I couldn't score high in any game mode making this even more of a PAIN. So my advice is to not even try for this achievement because I am claiming that it is glitched!!! I have tried emailing both companies several times but they don't even respond with an automated response. Due to their poor customer service I will be boycotting anything else they make. Yes I am bitter, very bitter. There were two gamers that had completed this in the past but both of them said their girlfriends did the game for them and thought it unlocked in freeze mode for them. They are no longer on TA so I am left to assume they cheated their ways towards the achievement. By all means if someone could find out from a credible source that this is indeed glitched let me know. Sorry that this isn't an actual guide on how to complete this.