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.
Unlock the Heather Beam.
Unlock the "Possesed" ending.
Acquire the Flamethrower.
Complete SH3 with 2 saves or less.
Defeat at least 75 enemies by shooting in SH3.
Acquire the Silencer.
Acquire the Gold and Silver pipes.
Acquire the Beam Saber.
Equip the "Princess Heart" costume.
Acquire the Unlimited Submachine Gun.
Unlock the "Normal" ending.
Complete SH3 in 3 hours or less.
Receive less than 500 points of damage in one game, in SH3.
Defeat God in under 8 minutes.
Defeat Memory of Alessa in under 3 minutes.
Pick up at least 100 items in SH3.
Defeat at least 75 enemies by fighting in SH3.
Defeat Leonard in under 3 minutes.
Defeat Missionary in under 2 minutes.
Defeat Split Worm in under 2 minutes.