Here is the full list of all 27 MUSYNX achievements.
Collect All Available Trophies.
Play a total of 200000 notes
Get one B rank
Play All Songs, All Difficulties, and All Modes
All Songs Average Sync to 115%
All Songs Average Sync to 110%
Get a total of 100 EX ranks
Get 50000 EXACT note marks total
Play 10 different songs in a row
Complete any song at 6 different stages
Play a total of 50000 notes
Get a total of 30 EX ranks
Get one EX rank at 6K Mode
Speak to the shopkeeper 10 times
Play one song 15 times continuously
Get 18000 EXACT note marks total
Play one song 8 times continuously
Any Song get 122% Sync
Select Exit when you play a Lv.10 or above song
Get a total of 5000 EXACT note judgements
Play a total of 10000 notes
Get EX rank on 10 songs
Get 120% Sync on any song
Get EX rank on 3 songs
Get one EX rank
Get 118% Syncrat on any song
Complete HD mode once