Full list of all 71 The Evil Within achievements. It takes around 40-50 hours to unlock all of the achievements in the base game on Windows.
The base game contains 41 achievements, and there are 3 DLC packs containing 30 achievements.
Finish the game with a clear time of under 5:00:00
Complete the game on Nightmare difficulty.
Finish the game on 悪夢(AKUMU) mode.
Kill 5 enemies in a row with a sneak kill without being discovered.
Completely upgrade all weapons.
Upgrade all options in the Stock menu.
I'm not taking any chances, this bus can't take much more damage. (Ch. 12)
His engine roars, but my knife is strong enough to take him out. (Ch.3)
Open up all the lockers in the save room.
Kill 400 enemies.
Completely upgrade one weapon.
It won't stay dead! Better only fight when I have to. (Ch. 7)
This cave echoes like crazy. Better put the gun away and keep quiet. (Ch. 8)
Finish the game without upgrading any skills with green gel.
Fully upgrade all of Sebastian's attributes.
Kill 5 enemies with each type of Agony Bolt.
Collect every collectable in the game.
Kill 3 living enemies with one drop of a match.
Completely upgrade three weapons.
Kill 5 enemies with a torch.
Use a secret explosive weapon to kill 10 enemies. (Agony Bolt effects negate results)
Sneak Kill an enemy after hitting them with a bottle.
Have they lost their minds? Better get past them without a fight. (Ch.2)
Defeat the ultimate evil within.
Complete the game on Casual difficulty.
Complete the game on Survival difficulty.
I should get this whole generator panel running just in case. (Ch. 14)
Outrun a gigantic threat in the city.
Remove an invisible enemy from the equation.
End a monstrosity in the underground garage.
Enough running! I'll burn her to the ground right here! (Ch. 10)
Kill 200 enemies.
Kill 25 enemies with melee attacks.
Escape the Keeper beneath the catacombs.
Take out both guardians before the church.
Who wouldn't reach out for a man clinging for his life? (Ch. 6)
Finish off a shrieking beast.
Kill 30 enemies.
The water's rising, but we'll get out of this without a scratch. (Ch. 5)
That vision in the hospice... why here? Why now? (Ch. 4)
Defeat the Sadist within the village.
Clear Chapter 2, "Crossing Paths."
Clear The Assignment in KURAYAMI Mode.
Lure an enemy with a phone call and lock them in a room. (Ch. 1)
Collect all Research Documents in The Assignment.
Get a Cadaver to grab and kill a Haunted. (Ch. 2)
Survive the duel without using any electronic devices in the environment. (Ch. 2)
Complete the hidden letter in The Assignment.
Use a single trap to kill two or more enemies in The Assignment. (Ch. 2)
Collect all Personnel Files in The Assignment.
Clear Chapter 1, "An Oath."
Clear the basement of the manor house in The Executioner.
Collect all Daughter's Diaries in The Executioner.
Kill 10 basic Haunted with environmental traps in The Executioner.
Kill 10 basic Haunted with the chainsaw.
Clear The Executioner without taking any damage.
Clear the first and second floors of the manor house in The Executioner.
Use Executions on 20 basic Haunted.
Purchase all items in the Shop.
Get payback on the cop who took down your predecessor.
Complete all Torments.
Get through the hotel without being spotted or killing any enemies. (Ch. 4)
Defeat Ruvik before the final showdown in The Consequence. (Ch. 4)
Complete the hidden letter in The Consequence.
Clear Chapter 3, "Illusions."
Clear The Consequence in KURAYAMI Mode.
Collect all Research Documents in The Consequence.
Turn on the generator using no more than 10 chemical lights. (Ch. 3)
Clear Chapter 4, "A Ghost is Born."
Collect all Personnel Files in The Consequence.
Save Sebastian's life in the hotel. (Ch. 4)