Here is the full list of all 45 Atelier Sophie: The Alchemist of the Mysterious Book achievements.
Collected all trophies.
Defeated the Demon Lord.
Learned every single recipe.
Saved up 100,000 Cole.
Given a challenge by Plachta.
Finished the battle, and returned to the atelier.
Defeated Luard.
Defeated the Light Elemental.
Raised friend level of all party members to maximum.
Witnessed Logy find new determination.
Defeated Yasuk.
Defeated Dorak.
Cauldron of Knowledge stolen by Meklet and Atomina.
Saw Oskar carrying Monika in his arms.
Changed Plachta's appearance.
Defeated Nazarus.
Reached maximum alchemy level.
Went on a date with Tess.
Enjoyed Monika's concert.
The donation to church reach the target figure which makes Pamela very happy.
Harol showed you the repaired clock.
Enjoyed a waterside vacation with Leon.
Saw Elise without her glasses on.
Walked in on Horst playing the piano.
Got good at playing the piano.
Satisfied Plachta during Doll Making.
Received a present.
Found out the machine box is a music box.
Reached maximum adventurer level.
Reached maximum Request rank.
Put on a new outfit.
Unleashed a special attack.
Turned Plachta into a doll.
Failed to turn Plachta into a human.
Enhanced a weapon or armor.
Found the identity of the voice in the cabin.
Slept for 3 whole days.
Registered an item at the duplication shop.
Saved by a mysterious person.
Crafted a weapon or armor.
Purchased a rumor.
Something bad happened while traveling.
Inspected a barrel.
Defeated a Puni in your first battle.
Met Plachta.