Here is the full list of all 19 Chloé's Requiem -encore- achievements.
There was another Michél in the mirror
Played Moonlight Sonata on the Piano
Took Chloé's eyes
Gave the doll your eyes
Found the Violin
Played Moonlight Sonata with Chloé
Played Traumerei with Chloé
There was something terrible written in Alain's Diary
Blanc was killed
Noir was killed
Chloé was killed
Played 24 Caprices
Played Nocturne No. 20 with Chloé
Broke the piano
Bad End 1
Bad End 2
Normal End
True End
Ghost End