Here is the full list of all 24 AVICII Invector achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Get a total score of 1 000 000 across all tracks and difficulties
Complete a song on any difficulty in split screen
Complete all levels
Get an "A Rank" on 20 levels
Get an "S Rank" on 10 levels
Get an "A Rank" on 10 levels
Get 100% note completion on Medium
Get 100% note completion on Hard
Get an "S+ Rank" on Hard
Boost without missing anything on Hard difficulty
Get 75% Perfects on any song
Get an "A Rank" on 5 levels
Get an "S Rank" on 5 levels
Get an "S+ Rank" on Medium
Get a total score of 250 000 across all tracks and difficulties
Get 100% note completion on Easy
Get an "S+ Rank" on Easy
Land 15 Perfects in a row
Get 50% Perfects on any song
Land 10 Perfects in a row
Get 25% Perfects on any song
Land 5 Perfects in a row
Hit all gates in a free-fly segment
Complete a song on any difficulty in single player