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