Here is the full list of all 21 Calm Girls achievements.
PASS_LEVEL8
PASS_LEVEL9
PASS_LEVEL10
PASS_LEVEL19
PASS_LEVEL20
PASS_LEVEL3
PASS_LEVEL4
PASS_LEVEL5
PASS_LEVEL6
PASS_LEVEL7
PASS_LEVEL13
PASS_LEVEL14
PASS_LEVEL15
PASS_LEVEL16
PASS_LEVEL17
PASS_LEVEL18
NEW_GAME_START
PASS_LEVEL1
PASS_LEVEL2
PASS_LEVEL11
PASS_LEVEL12