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