Full list of all 41 Silent Hill: Downpour achievements worth 1,000 gamerscore. It takes around 15-20 hours to unlock all of the achievements on Xbox 360.
Achieved "Surprise!" ending.
Completed the "Digging up the Past" side quest.
Achieved "Execution" ending.
Achieved "Truth & Justice" ending.
Completed the game on the hard game difficulty setting, any ending.
Completed the game on any difficulty without killing any monsters.
Achieved "Full Circle" ending.
Achieved "Forgiveness" ending.
Completed the game on the hard puzzle difficulty setting, any ending.
Killed or incapacitated 10 Prisoner Juggernauts.
Completed Murphy's Journal with all Mysteries.
Reached Overlook Penitentiary.
Killed 25 monsters with the Pistol or Shotgun.
Completed all side quests.
Completed the "Bird Cage" side quest.
Completed the "Mirror, Mirror" side quest.
Completed the "Shadow Play" side quest.
Killed or incapacitated 10 Weeping Bats.
Completed "The Art Collector" side quest.
Completed the "Homeless" side quest.
Completed the "Ribbons" side quest.
Completed the "Dead Man's Hand" side quest.
Completed the "Ashes to Ashes" side quest.
Defeated The Bogeyman.
Used 20 First Aid Kits.
Collected 3 pages of the rhyme book.
Killed or incapacitated 10 Dolls.
Completed "The Gramophone" side quest.
Completed the "Cinéma Vérité" side quest.
Completed "The Bank" side quest.
Incapacitated 20 monsters without killing them.
Killed or incapacitated 10 Prisoner Minions.
Escaped the Radio Station Otherworld.
Met DJ Ricks in the Radio Station.
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.