Here is the full list of all 38 Demon's Souls (JP) trophies - there are 27 bronze, 5 silver, 5 gold and 1 platinum.
All Trophies Obtained
All Miracles Learned
All Valuable Weapons Obtained
All Rings Obtained
Conqueror of Old King Doran
Obtained Best Weapon by Cloudstone
Obtained Best Weapon by Bladestone
Obtained Best Weapon by Darkmoonstone
Slayer of Demon “Flying Dragon”
Obtained Best Weapon by Greystone
All Magic Learned
Obtained Best Weapon by Moonlightstone
Obtained Best Weapon by Clearstone
Obtained Best Weapon by Suckerstone
Obtained Best Weapon by Pulpstone
Obtained Best Bow by Spiderstone
Old Beast Put to Sleep & World United
Slayer of Demon “False King”
Slayer of Demon “Penetrator”
Obtained Best Weapon by Mercurystone
Obtained Best Weapon by Dragonstone
Obtained Best Weapon by Faintstone
Slayer of Demon “Storm King”
Slayer of Demon “Maiden Astraea”
Slayer of Demon “Dragon God”
Slayer of Demon “Old Monk”
Slayer of Demon “Dirty Colossus”
Slayer of Demon “Old Hero”
Obtained Best Weapon by Sharpstone
Obtained Best Weapon by Splinterstone
Slayer of Demon “Maneater”
Slayer of Demon “Flamelurker”
Slayer of Demon “Tower Knight”
Slayer of Demon “Fool's Idol”
Slayer of Demon “Armor Spider”
Slayer of Demon “Adjucator”
Slayer of Demon “Leechmonger”
Slayer of Demon “Phalanx”