Here is the full list of all 30 Audica achievements.
Gold Star all songs on Expert.
Friends Leaderboard contains at least 10 friends.
Achieve Perfect Timing and Perfect Aim requirements together on a single run.
Beat a song with Mirror Mode enabled.
5-Star all songs on Beginner (or above).
5-Star all songs on Standard (or above).
5-Star all songs on Advanced (or above).
5-Star all songs on Expert.
Finish Campaign on Expert.
Complete the Advanced Tutorial.
Complete the Basics Tutorial.
Finish Campaign on Beginner (or above).
Finish Campaign on Standard (or above).
Finish Campaign on Advanced (or above).
Use the gun spinning feature while maintaining a streak.
Beat a song with aim-assist at 50% or lower.
Use the gun throwing feature while maintaining a streak.
Finish a song with an Average Aim Offset and Spread of under 1.5 degrees on both hands.
Finish a song with an Average Timing Offset of less than 5ms.