Here is the full list of all 53 STAR OCEAN THE DIVINE FORCE achievements.
Defeated the colossus of the Mhedume Ruins
Recruited Nina to join your party
Entered the village of Eda after a rough welcome
Recruited Midas to join your party
Met Theo in the town of Cotto
Found Dillwhip
Surprisingly endured a crushing defeat in Baldaar
Arrived at the Ancient Coil
Reunited with friends
Laeticia said “yes”
Tomorrow is the day to launch a major operation
Burst into the wedding and carried out the rescue
Allowed Emperor Bohld'or to escape
Depart from Aster at last
Arrived in Parrapoeiam
Peered into the darkness of the Pangalactic Federation
Basked in the light of hope
Saved the cosmos from peril
Raymond and Albaird thereafter
Raymond and Nina thereafter
Raymond and Midas thereafter
Raymond and Elena thereafter
Raymond and Marielle thereafter
Raymond and Malkya thereafter
Raymond and J.J. thereafter
Laeticia and Albaird thereafter
Laeticia and Nina thereafter
Laeticia and Midas thereafter
Laeticia and Elena thereafter
Laeticia and Marielle thereafter
Laeticia and Theo thereafter
Laeticia and Malkya thereafter
Clear 55 quests or more
Complete at least 90% of the Bestiary
Launched 100 Surprise Attacks
Defeated over 3,000 foes
Performed 200 Blindsides
Walked over 100 km
Flew over 100 km
Obtain at least 90% of all weapons
Opened all treasure chests in the universe
Found every mini-bunny
Used Item Creation for the first time
Won a game of Es'owa for the first time
Acquired the rank of Battle God
Watched every ending
Defeated the mighty Ethereal Queen
Defeated the all-powerful Gabriel Celeste
Beat the game on Universe difficulty
Beat the game on Chaos difficulty
Make at least 90% of all items in Item Creation
Raymond and Laeticia, and beyond
Laeticia and Raymond, and beyond