Here is the full list of all 50 Atelier Lydie Suelle The Alchemists and the Mysterious Paintings achievements.
Reached Normal Ending.
Reached S Rank.
Defeated the girl who lives in the dark red world.
Played with a fire dragon.
Reached max alchemist level.
Defeated the Creator deity.
Attended a coronation ceremony.
Defeated the core of Remplir.
Enjoyed a vacation.
Ascertained the bond between the twins.
Saw to a reconciliation of old friends.
Defeated the guileless Licensed Alchemist.
Witnessed heavy drinkers.
Witnessed weak drinkers.
Tricked Lucia.
Saw a marvelous puppet show.
Corneria has grown.
Had a reunion you have dreamt about.
Collected all insect materials.
Repainted surroundings during a battle.
Saw a surprising scene of Hagel and Pamela.
Saw a very happy Firis.
Defeated an ancient God of Thunder.
Got help from "one" who had certainly grown up.
A mysterious happening occurred during a battle in the painting world.
Used Battle Mix for the first time.
Begun the exploration of a mysterious painting.
Failed in synthesis in the atelier.
Performed a Character Change for the first time.
Unlocked All Achievements.
Reached Good Ending.
Reached Shop Ending
Reached Mysterious Painter Ending.
Reached True Ending.
Was treated to a wonderful potato stew.
Gave Plachta a massage.
Inspected great many barrels.
Customized a weapon for the first time.
Created all weapons and armors.
Spent a lot of money in Corneria's shop.
Collected all fish materials.
Used all patterns of the Battle Mix.
Saw all the Combination Arts.
Created an unbelievable item using the Extra Mix.
Finished many Quests.
Fulfilled all Ambitions.
Discovered all recipes.
Synthesized all items.
Reached max battle level.
Defeated the two goddesses who unleashed their full strength.