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 using herbs or medicine.
Complete the game on Normal without enhancing swords or using Jewels.
Complete the game on Ultimate difficulty.
Complete all stages of Oni Spirits.
Unlock Kaede's alternate outfit.
Complete the game and get an S Rank.
Use Magic Jewels to increase Magic Power to maximum.
Complete the game in less than 3 hours.
Collect all Fluorite.
Find the beetle on the tree trunk.
Obtain the Bishamon Sword.
Unlock Samanosuke's alternate outfit.
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.
Enhance all swords to maximum.
Enhance the gauntlet to maximum.
Complete the second half of the Dark Realm.
Complete the first half of the Dark Realm.
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.
Use Power Jewels to increase Vitality to maximum.
Absorb souls from carp.
Use the Decorated Sword to enter the East Area.
Obtain all long-range weapons.
Obtain the Vision Staff.
Enhance all orbs to maximum.
Defeat Barabazuu.
Kill a demon with a battering ram.
Speak to the first and second old moth man.
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.
Win a power struggle with a demon.
Obtain the Arashi.
Defeat Marcellus.
Solve the crest puzzle.
Enter the abandoned keep.
Obtain the Kouen.
Defeat Osric.
Enhance equipment at Magic Mirror.
Save a soldier under attack by demons.
Obtain the Shiden.
Spot the flock of wild geese at dusk.
Use the gauntlet to absorb demon souls.
Use a Special Attack to kill a demon.