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