Its a relly good game, im up to the devil bit on medium, online play is really god, it would be btter if more people played online, my favourite song is cliffs of dover and thats a bout it i would rate this game 110%
great game... i got it for christmas for my wii and the first thing i did was 5-star every song on medium for easy cash to buy all the extra songs and unlock metal head and some extra guitars... now i'm going to try and beat it on hard. this is going to prove to be tough though.. considering how much more difficult GH3 seems to be than the previous GH games...
so far i've 5-starred the first two sets on hard and then the first 2 songs on the 3rd set (the killers and A.F.I.) --- hopefully my 5-star reign doesn't end too soon haha the extra cash is really handy
through the fire and flames is pretty freakin hard, even on medium! i played it on quick play and only managed a 79% hahah
oh and to answer the question above... no you do not have to beat it on expert to unlock all the extra songs... just win cash and purchase them from the store. there will be 7 other songs that you cannot unlock by purchasing from single player career mode though. 6 of them must be unlocked via co-op career mode, and then through the fire and flames is unlocked upon beating career mode (any difficulty) and will be placed in the bonus tracks, for those who don't know