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.
Use Magic Jewels to increase Magic Power to maximum.
Unlock Kaede's alternate outfit.
Complete the game and get an S Rank.
Complete the game on Normal without enhancing swords or using Jewels.
Complete the game on Normal without using herbs or medicine.
Win a power struggle with a demon.
Find the beetle on the tree trunk.
Spot the flock of wild geese at dusk.
Complete the game in less than 3 hours.
Complete the game on Ultimate difficulty.
Defeat a demon by knocking it down the waterfall.
Obtain the Rosary of Communication.
Complete all stages of Oni Spirits.
Unlock Samanosuke's alternate outfit.
Defeat Fortinbras.
Obtain the Bishamon Sword.
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.
Solve all decoder boxes.
Collect all files.
Use Power Jewels to increase Vitality to maximum.
Defeat Hecuba.
Solve all number puzzles.
Collect all Fluorite.
Enhance the gauntlet to maximum.
Obtain all armor for Samanosuke.
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.
Enhance all swords to maximum.
Obtain the Vision Staff.
Enhance all orbs to maximum.
Complete the second half of the Dark Realm.
Complete the first half of the Dark Realm.
Defeat Stylado.
Obtain the Sacred Knife.
Cut down bamboo in the bamboo forest.
Speak to the first and second old moth man.
Strike a demon with Kaede's Special Attack.
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.
Obtain the Shiden.
Use the gauntlet to absorb demon souls.
Use a Special Attack to kill a demon.