Here is the full list of all 43 Beats Fever achievements.
Completed 3 music tracks
Browsed the credits list
Played once for 6 minutes in tracks
Completed 1 music track
Reached 1 million in total score
Completed any track once
Got Rank A or higher once
Got Rank B or higher on any track
Got Rank A or higher on any track
Completed 10 music tracks
Completed 5 different tracks
Completed 10 different tracks
Completed 20 different tracks
Reached 10 million in total score
Reached 20 million in total score
Completed 100 music tracks
Completed 1000 music tracks
Completed 5 music tracks
Played once for 20 minutes in tracks
Played once for 1 hour in tracks
Played once for 2 hours in tracks
Played once for 3 hours in tracks
Got Rank A or higher 10 times
Got Rank A or higher 100 times
Got Rank A or higher 1000 times
Got Rank A or higher on 10 different tracks
Got Rank A or higher on 20 different tracks
Got Rank S on any track
Got Rank S on 5 different tracks
Got Rank S on 10 different tracks
Got Rank S on 15 different tracks
Got Rank S on 20 different tracks
Entered the game on Feb. 14
Entered the game on Dec. 24
Completed any track without miss hit
Got Rank A or higher with one hand
Got Rank S on 30 different tracks
Got Rank S on 25 different tracks
Got Rank A or higher on 30 different tracks
Completed 30 different tracks
Completed 40 different tracks
Got Rank A or higher on 40 different tracks
Got Rank S on 40 different tracks