Here is the full list of all 14 A Potion For Chamomile achievements.
Buy soul matter.
Bless the frost powder.
Kill a blue mandrake.
Collect some pink moss.
Obtain the gem core.
Brew the potion.
Complete extra scene 1.
Complete extra scene 2.
Complete extra scene 3.
Complete extra scene 4.
Complete extra scene 5.
Play a round of Blind Gunner.
Beat Cinnamon's highscore of 6170 points in Blind Gunner.
Beat Chamomile's highscore of 10940 points in Blind Gunner.