Here is the full list of all 33 Klang 2 achievements.
Clear the tutorial
Defeat the first boss!
Defeat second boss!
Defeat third boss!
Defeat fourth boss!
Defeat fifth boss!
Defeat the final boss!
Watch the ending leading into the original Klang.
Complete your first fast mode challenge.
First S rank!
Achieve 100 % on any track from section 1 or above.
S rank every track in section 0 on normal speed.
S rank every track in section 1 on normal speed.
S rank every track in section 2 on normal speed.
S rank every track in section 3 on normal speed.
S rank every track in section 4 on normal speed.
S rank every track in section 5 on normal speed.
S rank every track in section 0 on both normal and fast speed.
S rank every track in section 1 on both normal and fast speed.
S rank every track in section 2 on both normal and fast speed.
S rank every track in section 3 on both normal and fast speed.
S rank every track in section 4 on both normal and fast speed.
S rank every track in section 5 on both normal and fast speed.
Achieve 240 completion score!
Achieve 150 completion score!
Complete the section 1 conversation with A-Eye.
Complete the section 2 conversation with A-Eye.
Complete the section 3 conversation with A-Eye.
Complete the section 4 conversation with A-Eye.
Complete the section 5 conversation with A-Eye.
Complete all A-Eye conversations in the moon room.
Unlock the moon room by defeating a boss with story content enabled.
Clear a stage without taking damage in section 1 or above.