Trophies

Successfully complete one of the following tasks to get a trophy:

Pure Evil (Platinum): Unlocked all trophies for The Evil Within.
First Step into Darkness (Bronze): Complete the game on Casual difficulty.
Another Day on the Job (Silver): Complete the game on Survival difficulty.
Master of Horror (Silver): Complete the game on Nightmare difficulty.
Every Nook and Cranny (Silver): Collect every collectable in the game.
Master of Unlocking (Bronze): Open up all the lockers in the save room.
Hardbody (Silver): Fully upgrade all of Sebastian's attributes.
My Best Friend (Bronze): Completely upgrade one weapon.
The Power of Three (Bronze): Completely upgrade three weapons.
Unstoppable Arsenal (Gold): Completely upgrade all weapons.
Why Can't I Hold All This Ammo? (Bronze): Upgrade all options in the Stock menu.
Blow Up the Playing Field (Silver): Use a secret explosive weapon to kill 10 enemies. (Agony Bolt effects negate results)
Full House (Bronze): Kill 5 enemies with each type of Agony Bolt.
Silent Kill (Bronze): Kill 5 enemies in a row with a sneak kill without being discovered.
Burn, Baby, Burn! (Bronze): Kill 5 enemies with a torch.
...And the Corpses Mount (Bronze): Kill 30 enemies.
Krimson PD Fury (Bronze): Kill 200 enemies.
One Man Army (Silver): Kill 400 enemies.
Ammo Conservationist (Bronze): Kill 25 enemies with melee attacks.
Bloody Bar Brawl (Bronze): Sneak Kill an enemy after hitting them with a bottle.
Drop It Like It's Hot (Bronze): Kill 3 living enemies with one drop of a match.
The Quick and the Dead (Gold): Finish the game with a clear time of under 5:00:00.
It Is What It Is (Gold): Finish the game without upgrading any skills with green gel.
You Asked For It (Gold): Finish the game on 悪夢(AKUMU) mode.
À la Corvo (Bronze): Have they lost their minds? Better get past them without a fight. (Ch.2)
Knife Beats Chainsaw (Silver): His engine roars, but my knife is strong enough to take him out. (Ch.3)
Home is Where the Hospice is (Bronze): That vision in the hospice... why here? Why now? (Ch. 4)
Not Part of the Job Description (Silver): The water's rising, but we'll get out of this without a scratch. (Ch. 5)
Everybody Gets One (Bronze): Who wouldn't reach out for a man clinging for his life? (Ch. 6)
I Don't Have Time for This! (Bronze): It won't stay dead! Better only fight when I have to. (Ch. 7)
Item Management (Bronze): This cave echoes like crazy. Better put the gun away and keep quiet. (Ch. 8)
Bathed in Flames (Silver): Enough running! I'll burn her to the ground right here! (Ch. 10)
Not a Scratch on Her! (Bronze): I'm not taking any chances, this bus can't take much more damage. (Ch. 12)
Entry Level Electrician (Bronze): I should get this whole generator panel running just in case. (Ch. 14)

Additionally, there are eight secret trophies:

Weapon of Choice (Bronze): Defeated the Sadist within the village.
Old Flame (Bronze): Finished off a shrieking beast.
Two on Two (Bronze): Took out both guardians before the church.
What's In The Box?! (Bronze): Escaped the Keeper beneath the catacombs.
The First, Not the Last (Bronze): Ended a monstrosity in the underground garage.
Arachnophobia (Bronze): Outran a gigantic threat in the city.
Slither into Oblivion (Bronze): Removed an invisible enemy from the equation.
One of the Many (Bronze): Defeated the ultimate evil within.