Here is the full list of all 43 Beats Fever achievements.
Completed 1 music track
Completed 10 music tracks
Completed 5 different tracks
Completed 10 different tracks
Completed 20 different tracks
Played once for 6 minutes in tracks
Reached 1 million in total score
Reached 10 million in total score
Reached 20 million in total score
Completed 3 music tracks
Completed 100 music tracks
Completed 1000 music tracks
Completed 5 music tracks
Completed any track once
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 once
Got Rank A or higher 10 times
Got Rank A or higher 100 times
Got Rank A or higher 1000 times
Got Rank B or higher on any track
Got Rank A or higher on any track
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
Browsed the credits list
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