Here is the full list of all 44 Fallen Legion: Flames of Rebellion trophies - there are 30 bronze, 10 silver, 3 gold and 1 platinum.
Congratulations! You obtained all of the trophies.
Use the Psyche Devourer spell.
Use three of the same Exemplar in battle.
Face the Order of the Bleeding Axe.
Use two of the same Exemplar in battle.
Unlock Order Longinus.
Unlock Order Apollon.
Unlock the epilogue.
Complete One Life mode.
Unlock Chaos Zulfiqar.
Unlock Chaos Winchester.
Unlock Order Dardanelles.
Unlock Chaos Mjolnir.
Trigger break mode while fighting the final boss.
Complete the third act.
Master many deathblows.
Join a raid with Constantine.
Trigger break mode while fighting General Aurelius.
Discover the secret in Styricaem.
Use the White Staccato spell.
Trigger break mode while fighting the Crystal Golem.
Unlock Chaos Apollon.
Complete the second act.
Unlock Order Mjolnir.
Unlock Chaos Longinus.
Defeat the Ouroboros Cypress.
Choose March Congress cards 25 times.
Choose Prime Legion cards 25 times.
Choose Council of Princes cards 25 times.
Unlock Order Winchester.
Unlock Order Zulfiqar.
Trigger break mode while fighting Micena.
Find a celestial gem or an arcane gem.
Earn a S-rank in a stage.
Trigger break mode while fighting the Vandee Werewolf.
Rescue Princess Agnes in her time of need.
Unlock Chaos Dardanelles.
Complete the first act.
Trigger break mode while fighting the Manticore.
Complete a 100-chain combo.
Complete a 50-chain combo.
Perform a link attack.
Inflict over 9,000 damage without breaking the chain meter.
Deflect an enemy attack with a perfect block.