Here is the full list of all 51 The Evil Within 2 achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.
Avoided unnecessary bloodshed outside City Hall. (Ch. 5)
Opened 16 lockers.
Completely upgraded all abilities.
Killed 3 enemies using upgraded Smoke Bolts.
Upgraded one of your Warden Crossbow bolts to max level.
Killed 2 or more enemies at once using oil on the ground.
Killed 2 or more enemies at once using a hanging lamp. (Ch. 9)
Opted for a cinematic experience.
Completed the game on Casual difficulty or higher.
Completed the game on Survival difficulty or higher.
Collected all of the Mysterious Objects.
Did what needed to be done to save your daughter.
Observed all Residual Memories.
Reached the very end of the world.
Your trauma is no more.
Made it inside the enemy's stronghold.
Talked to Kidman about all of the photographic slides.
Came to terms with your past and present.
Reminisced about every moment from your past. (Ch. 12)
Provided a Harbinger sweet release.
Experienced every traumatic encounter and made peace with your inner demons.
Stomped and killed 15 fallen enemies.
Completed the "The Last Step" side mission.
Survived an ordeal with the help of a new friend.
Shut down a bloody performance.
Upgraded a weapon to Level 3.
Found a potential ally in The Marrow.
Collected 20 files.
Defeated the Guardian outside City Hall.
Used your first High-Grade Weapon Parts.
Used your first Red Gel.
Completed the "Rogue Signal" side mission.
Stunned an enemy standing in water using a Shock Bolt.
Acquired the Warden Crossbow.
Saw a chilling vision.
Killed 60 enemies.
Killed 30 enemies.
Killed 10 enemies using Sneak Kills.
Crafted something for the first time.
Took the plunge back into STEM.
Completed the game on Nightmare difficulty or higher.
Completed the game in Classic Mode.
Completely upgraded all weapons.
Crafted every type of item at least once.
Collected all files.
Opened all lockers.
Acquired all standard weapons.
Used every Coffee Maker at least once.
Killed an enemy using an Ambush.
Stopped a true believer from playing with his favorite toy. (Ch. 11)
Brought your own equipment to the barbecue this time. (Ch. 14)