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.
Reached combat level 99. You're just getting started!
Assigned to Stellard as new officials.
Decided to face the Dusk together with Shallie.
Emerged victorious over the king of dragonkin.
Found a solution for the drought, and returned to Lugion.
Saw Shallistera's story through to the end.
Acknowledged by the king of beasts ruling the underground.
Participated in the Confection Fair.
Chose Shallistera's story.
Started a 2nd playthrough.
Set off on a new adventure, for Nady's medicine.
Decided to run an atelier in Stellard with Stera and Miruca.
Saw Shallotte's story through to the end.
Encountered Harry and Gerard having a chat.
Stopped the being controlling the water source.
Reached alchemy level 99. Now you're a full fledged alchemist!
Completed objectives of chapter 9.
Saw Miruca and Jurie working together.
Saw the place where Linca was born.
Completed objectives of chapter 8.
Enjoyed the Water Festival.
Encountered the alchemist Keithgriff.
Contracted with the spirit ruling the Dusk Sea.
Defeated the master of the Ghost Ship.
Encouraged Master Wilbell.
Completed objectives of chapter 7.
Saw Raoul's moment of utter defeat.
Made amends with Shallie.
Completed objectives of chapter 6.
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.