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