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