Full list of all 21 Yu-Gi-Oh! Legacy of the Duelist trophies - 21 bronze. It takes around 25-30 hours to unlock all of the trophies on PlayStation 4.
Win All Duelist Challenges
Win a Battle Pack match (duel)
Unlock all avatars
Chain 100 times
Win an unranked multiplayer match (duel)
Deal 50k in Reflective Damage
Defeat ZEXAL Campaign
Defeat 5Ds Campaign
Win a duel by having all Exodia cards in hand
Perform an Xyz Summon
Perform a Synchro Summon
Perform a Pendulum Summon
Perform a Fusion Summon
Deal 100k in Effect Damage
Defeat GX Campaign
Defeat Classic Campaign
Create 5 decks
Create your first deck
Deal 200k in Direct Damage
Perform a Tribute Summon
Win a ranked multiplayer match (duel)