Here is the full list of all 42 Silent Hill: Downpour trophies - there are 24 bronze, 14 silver, 3 gold and 1 platinum.
Achieved "Execution" ending.
Achieved "Truth & Justice" ending.
Killed or incapacitated 10 Prisoner Juggernauts.
Used 20 First Aid Kits.
Incapacitated 20 monsters without killing them.
Killed or incapacitated 10 Prisoner Minions.
Reached Overlook Penitentiary.
Completed the "Mirror, Mirror" side quest.
Defeated The Bogeyman.
Killed or incapacitated 10 Weeping Bats.
Collected 3 pages of the rhyme book.
Killed or incapacitated 10 Dolls.
Escaped the Radio Station Otherworld.
Met DJ Ricks in the Radio Station.
Escaped from 20 monsters.
Completed the "Stolen Goods" side quest.
Escaped from Devil's Pit.
Killed or incapacitated 10 Screamers.
Rode the Sky Tram to Devil's Pit.
Survived the Diner Otherworld.
Collected all trophies.
Achieved "Forgiveness" ending.
Achieved "Full Circle" ending.
Achieved "Surprise!" ending.
Completed all side quests.
Completed the "Digging up the Past" side quest.
Completed the "All Points Bulletin" side quest.
Completed "The Art Collector" side quest.
Completed "The Bank" side quest.
Completed the "Homeless" side quest.
Completed the "Cinéma Vérité" side quest.
Completed "The Gramophone" side quest.
Completed the "Shadow Play" side quest.
Completed the "Dead Man's Hand" side quest.
Completed the "Ashes to Ashes" side quest.
Completed the "Ribbons" side quest.
Completed the "Bird Cage" side quest.
Completed Murphy's Journal with all Mysteries.
Completed the game on the hard game difficulty setting, any ending.
Completed the game on the hard puzzle difficulty setting, any ending.
Killed 25 monsters with the Pistol or Shotgun.
Completed the game on any difficulty without killing any monsters.