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