Here is the full list of all 19 AudioSurf achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.
Dethrone a friend from a global scoreboard.
Beat a friend's score less than 15 min. after they earn it.
Fill all columns within 15 seconds. No greys. No matches.
Finish Clean, Gold before finish, hit last block, elite only.
Score 17000 points in a single match.
Collect a match of 24 blocks.
Using Ninja Mono, earn Stealth. 11 min minimum.
Turn 21 blocks red with a single paint.
Collect a chain reaction of 7 white blocks.
Earn triple a gold medal requirement. 2 min minimum.
Using Ninja Mono, earn Stealth. 7 min minimum.
Make a candy stripe.
Earn Clean Finish and Gold 3 times in a row.
30000 points per minute. 3 minute minimum.
Collect matches in 4 colors simultaneously.
Using Ninja Mono, earn Stealth. 3 min minimum.
Stealth and collect every color block. 3 min minimum.
Earn Gold without overfilling. 2 min minimum.
10000 points per minute. 3 minute minimum.