Here is the full list of all 39 Atelier Shallie Plus: Alchemists of the Dusk Sea trophies - there are 24 bronze, 10 silver, 4 gold and 1 platinum.
All trophies obtained.
Decided to face the Dusk together with Shallie.
Assigned to Stellard as new officials.
Found a solution for the drought, and returned to Lugion.
Saw Shallistera's story through to the end.
Chose Shallistera's story.
Started a 2nd playthrough.
Reached combat level 99. You're just getting started!
Reached alchemy level 99. Now you're a full fledged alchemist!
Decided to run an atelier in Stellard with Stera and Miruca.
Set off on a new adventure, for Nady's medicine.
Saw Shallotte's story through to the end.
Encountered Harry and Gerard having a chat.
Stopped the being controlling the water source.
Acknowledged by the king of beasts ruling the underground.
Completed objectives of chapter 9.
Emerged victorious over the king of dragonkin.
Saw Miruca and Jurie working together.
Saw the place where Linca was born.
Completed objectives of chapter 8.
Enjoyed the Water Festival.
Participated in the Confection Fair.
Contracted with the spirit ruling the Dusk Sea.
Encouraged Master Wilbell.
Encountered the alchemist Keithgriff.
Completed objectives of chapter 7.
Saw Raoul's moment of utter defeat.
Made amends with Shallie.
Completed objectives of chapter 6.
Defeated the master of the Ghost Ship.
Found out that Nady is gravely ill.
Completed objectives of chapter 5.
Defeated the dragon threatening Stellard.
Completed objectives of chapter 4.
Completed objectives of chapter 3.
Completed objectives of chapter 2.
Completed objectives of chapter 1.
Saved from a predicament by Wilbell.
Chose Shallotte's story.