Here is the full list of all 56 Onimusha: Warlords trophies - there are 48 bronze, 5 silver, 2 gold and 1 platinum.
Collect all trophies.
Complete the game on Normal without enhancing swords or using Jewels.
Win a power struggle with a demon.
Unlock Kaede's alternate outfit.
Complete the game and get an S Rank.
Complete the game on Ultimate difficulty.
Defeat a demon by knocking it down the waterfall.
Spot the flock of wild geese at dusk.
Complete all stages of Oni Spirits.
Obtain the Bishamon Sword.
Complete the second half of the Dark Realm.
Collect all Fluorite.
Complete the first half of the Dark Realm.
Unlock Samanosuke's alternate outfit.
Complete the game in less than 3 hours.
Complete the game on Normal without using herbs or medicine.
Defeat Fortinbras.
Enhance the gauntlet to maximum.
Strike Marcellus's final form with a Deflect Critical attack.
Collect all maps.
Defeat Marcellus's final form.
Open the gate to the Demon World.
Enhance all swords to maximum.
Defeat Hecuba.
Solve all number puzzles.
Collect all files.
Use Magic Jewels to increase Magic Power to maximum.
Use Power Jewels to increase Vitality to maximum.
Solve all decoder boxes.
Obtain all armor for Samanosuke.
Absorb souls from carp.
Use the Decorated Sword to enter the East Area.
Obtain all long-range weapons.
Enhance all orbs to maximum.
Defeat Barabazuu.
Kill a demon with a battering ram.
Cut down bamboo in the bamboo forest.
Obtain the Vision Staff.
Defeat Stylado.
Strike a demon with Kaede's Special Attack.
Obtain the Sacred Knife.
Speak to the first and second old moth man.
Obtain the Rosary of Communication.
Unseal the path to the Keep Underground.
Obtain the Arashi.
Defeat Marcellus.
Solve the crest puzzle.
Enter the abandoned keep.
Obtain the Kouen.
Defeat Osric.
Save a soldier under attack by demons.
Enhance equipment at Magic Mirror.
Find the beetle on the tree trunk.
Obtain the Shiden.
Use the gauntlet to absorb demon souls.
Use a Special Attack to kill a demon.