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