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