Here is the full list of all 45 Atelier Firis: The Alchemist and the Mysterious Journey achievements.
Defeated Twin Gods Emuel.
Built a ship that can fly.
Made amends with Ilmeria.
Defeated Palmyra.
Used the Corneria doll to refill items.
Passed the official alchemy exam.
Defeated Sophie during the license exam.
Changed costumes.
Wore the clothes your mother sent from home.
Built a ship that can cross a waterspout.
Performed advanced Synthesis for the first time.
Completed the map of an area.
Used Atelier Making to redecorate.
Obtained a letter of recommendation.
Set up your Atelier for the first time.
Discovered a landmark.
Met Sophie and Plachta.
Collected all trophies!
Decided what to do in life.
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.
Embraced whole-heartedly by Liane.
Held a puppet show in Ertona.
Watched Revy cook at a food stall.
Witnessed how much Angriff can drink.
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.
Checked many barrels.
Defeated the Avenger.
Defeated Logius.
Defeated the Sleeper of the Depths.