Here is the full list of all 54 Atelier Rorona ~The Alchemist of Arland~ DX achievements.
Obtained by reaching Alchemy Level 50.
Obtained by seeing the True Ending image.
Obtained after the event where Sterk gets injured.
Obtained by reaching Adventurer Level 50.
Obtained by defeating a demon at Night's Domain.
Obtained after the event where Rorona helps out Iksel.
Obtained by defeating one of the dragons.
Obtained after you receive a gift from master from the future.
Obtained after meeting alchemists from the future.
Obtained by seeing the Normal Ending image.
Obtained after clearing the last assignment.
Obtained after clearing the 11th assignment.
Obtained after clearing the 10th assignment.
Obtained after clearing the 9th assignment.
Obtained by winning the Martial Contest.
Obtained after clearing the 8th assignment.
Obtained after the first Pamela event.
Obtained after the event where Gio slices up a monster.
Obtained after clearing the 7th assignment.
Obtained after the event with Hom and the kitten.
Obtained after clearing the 6th assignment.
Obtained after clearing the 5th assignment.
Obtained after the first Tantris event.
Obtained after clearing the 4th assignment.
Obtained by winning the Cabbage Festival contest.
Obtained after clearing the 3rd assignment.
Obtained after the first Lionela event.
Obtained after clearing the 2nd assignment.
Obtained after clearing the 1st assignment.
Obtained after the event where the workshop is passed down to Rorona.
Unlocked All Achievements.
Obtained after the event where Rorona and Cordelia make up.
Obtained after the event where the puppets get fixed.
Obtained after the event where Rorona and Tantris play music together.
Obtained after the event with a drunken Tiffani.
Obtained after the event where Rorona goes to the lake with everyone.
Obtained by seeing the Cordelia Ending image.
Obtained by seeing the Gio Ending image.
Obtained by seeing the Astrid Ending image.
Obtained by seeing the Good Ending image.
Obtained by seeing the Iksel Ending image.
Obtained by seeing the Sterk Ending image.
Obtained by seeing the Lionela Ending image.
Obtained by seeing the Tantris Ending image.
Obtained by seeing the Pie Shop Ending image.
Obtained by seeing the Adventurer Ending image.
Obtained by seeing the Rich Ending image.
Obtained by defeating Iron Giant at Orthogalaxen.
Obtained after you help find Esty's love.
Obtained after you send the two alchemists back to the future.
Obtained after you purify the demon lord.
Obtained after you defeat the Ozean Kaiser.
Obtained after you defeat the wyvern that rules the skies.
Obtained after going to the lake for a vacation with Esty.