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