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