Here is the full list of all 45 Atelier Firis: The Alchemist and the Mysterious Journey achievements.
Met Sophie and Plachta.
Collected all trophies!
Built a ship that can cross a waterspout.
Obtained a letter of recommendation.
Passed the official alchemy exam.
Decided what to do in life.
Built a ship that can fly.
Departed on an alchemic journey with Sophie.
Decided to master alchemy.
Departed on a whimsical journey with Liane.
Opened an atelier with Ilmeria.
Decided to join Drossel's puppet show.
Joined Revy's quest to become the strongest.
Departed on a historical journey with Kald.
Became a teacher at Angriff's new school.
Joined Oskar to befriend plants around the world.
Decided to go on a never ending, mysterious journey.
Enjoyed bathing in a hot spring.
Enjoyed the Flussheim festival.
Listened to a song of appreciation by Luis.
Wore the clothes your mother sent from home.
Embraced whole-heartedly by Liane.
Made amends with Ilmeria.
Held a puppet show in Ertona.
Watched Revy cook at a food stall.
Witnessed how much Angriff can drink.
Performed advanced Synthesis for the first time.
Discovered a landmark.
Completed the map of an area.
Melted the snow on a mountain.
Visited every area.
Came up with a lot of recipes.
Completed a lot of chain quests.
Submitted a lot of data.
Used Atelier Making to redecorate.
Changed costumes.
Checked many barrels.
Set up your Atelier for the first time.
Used the Corneria doll to refill items.
Defeated the Avenger.
Defeated Logius.
Defeated the Sleeper of the Depths.
Defeated Twin Gods Emuel.
Defeated Sophie during the license exam.
Defeated Palmyra.