Here is the full list of all 22 Silent Hill 3 HD trophies - there are 2 bronze, 13 silver, 6 gold and 1 platinum.
Unlock all Trophies in SH3.
Unlock the "UFO" ending.
Complete SH3 with 2 saves or less.
Unlock the Heather Beam.
Receive less than 500 points of damage in one game, in SH3.
Defeat at least 75 enemies by shooting in SH3.
Acquire the Unlimited Submachine Gun.
Acquire the Silencer.
Acquire the Gold and Silver pipes.
Acquire the Beam Saber.
Unlock the "Possesed" ending.
Defeat Memory of Alessa in under 3 minutes.
Defeat at least 75 enemies by fighting in SH3.
Acquire the Flamethrower.
Equip the "Princess Heart" costume.
Unlock the "Normal" ending.
Complete SH3 in 3 hours or less.
Defeat God in under 8 minutes.
Defeat Leonard in under 3 minutes.
Pick up at least 100 items in SH3.
Defeat Missionary in under 2 minutes.
Defeat Split Worm in under 2 minutes.