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