Here is the full list of all 30 Dub Dash achievements.
Play 250.000 beats.
Collect 24 notes.
Complete Dubstep Rock in practice mode.
Complete Dubstep Rock.
Complete Helium.
Complete Helium in practice mode.
Complete Anti Headache.
Complete Midnight Sun in practice mode.
Complete Anti Headache in practice mode.
Complete Dub Dash in practice mode.
Complete Midnight Sun.
Collect 16 notes.
Complete Milky Ways in practice mode.
Complete Dub Dash.
Complete Sound Ward in practice mode.
Complete Milky Ways.
Play 25.000 beats.
Make 1.000 attempts.
Collect 9 notes.
Complete Flying High in practice mode.
Complete Massive Dance in practice mode.
Complete Sound Ward.
Make 100 attempts.
Complete Flying High.
Play 2.500 beats.
Complete Massive Dance.
Collect 1 note.
Collect 3 notes.
Make 10.000 attempts.
Make 50.000 attempts.