as im sure most people will agree, achievement are unreal, and u cant have too many of them cus they are pro as ****.
with that out of the way, start thinking of ideas.
i was also thinking, certain 'song specific' achievements could grant access to a new difficulty on the song in question.
il start it off.
1st idea, shared by many
beat Third style ultimate diss.
to continue on this one, with my idea, i was thinking if you unlock this achievement, you also unlock a "badboy" difficulty on this same song (the file patashu has). also, the diss song shud be made challenge difficulty.
second idea, well not really an idea, just gonna list some possible 'generic' music game achievements down.
100m over all total score
200m over all total score
500m over all total score
1000m (1b) over all total score
10000m (10b) over all total score
Play your first game of thirdstyle
play 100 games
play 500 games
play 1000 games
play 10000 games
play 50000 games (naturally achievements like this (and the 10b) are long term achievemnt that will naturally come over time and hopefully keep people playing)
p.s. not sure if this is what you were refering too in the chat patashu, but these would be the descriptions for the achievements, different creative names would be thought up for them also. :p