Here is the full list of all 28 Wild Arms 3 trophies - there are 9 bronze, 13 silver, 5 gold and 1 platinum.
Unlock all trophies.
Defeat the Nega Filgaia.
Defeat Ragu O Ragla for the final time.
Explore 100% of the World Map.
Destroy the Mothership.
Complete each division and defeat Bad News at Gunner's Heaven.
Complete the Journeyman Division at Gunner's Heaven.
Reach level 90 with Virginia, Clive, Jet, and Gallows.
Defeat Lolithia at Mimir's Well.
Buy something from the Black Market.
Read all 11 Adventure chapters to Kaitlyn and receive her EX File Key.
Reach Migrant Level 20.
Complete every Millennium Puzzle.
Reach level 50 with Virginia, Clive, Jet, and Gallows.
Raise every character's LCK rating to BEST.
Defeat Dragna Sieg at Deus Ex Machina.
Reach Upgrade Level 15.
Defeat Leehalt, Melody, and Malik in the final battle at Yggdrasil.
Reach Migrant Level five.
Complete the Novice Division at Gunner's Heaven.
Upgrade an ARM attribute to level five.
Win a battle using the Sandcraft's Ark Smasher weapon.
Inflict 50,000 damage with one strike.
Breed a plant in the Secret Garden.
Defeat Janus at Ka Dingel.
Successfully disarm a treasure chest trap.
Receive your first four mediums.
Defeat Janus on the roof of the train.