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.
Completed the game in Classic Mode.
Brought your own equipment to the barbecue this time. (Ch. 14)
Opened all lockers.
Stopped a true believer from playing with his favorite toy. (Ch. 11)
Collected all files.
Opted for a cinematic experience.
Completely upgraded all weapons.
Killed 2 or more enemies at once using a hanging lamp. (Ch. 9)
Observed all Residual Memories.
Avoided unnecessary bloodshed outside City Hall. (Ch. 5)
Completely upgraded all abilities.
Opened 16 lockers.
Collected all of the Mysterious Objects.
Killed 2 or more enemies at once using oil on the ground.
Crafted every type of item at least once.
Acquired all standard weapons.
Completed the game on Casual difficulty or higher.
Completed the game on Survival difficulty or higher.
Completed the game on Nightmare difficulty or higher.
Did what needed to be done to save your daughter.
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.
Completed the "The Last Step" side mission.
Came to terms with your past and present.
Reminisced about every moment from your past. (Ch. 12)
Upgraded a weapon to Level 3.
Provided a Harbinger sweet release.
Experienced every traumatic encounter and made peace with your inner demons.
Used every Coffee Maker at least once.
Survived an ordeal with the help of a new friend.
Stomped and killed 15 fallen enemies.
Shut down a bloody performance.
Found a potential ally in The Marrow.
Collected 20 files.
Defeated the Guardian outside City Hall.
Upgraded one of your Warden Crossbow bolts to max level.
Killed an enemy using an Ambush.
Killed 60 enemies.
Killed 3 enemies using upgraded Smoke Bolts.
Saw a chilling vision.
Used your first Red Gel.
Completed the "Rogue Signal" side mission.
Killed 30 enemies.
Used your first High-Grade Weapon Parts.
Crafted something for the first time.
Killed 10 enemies using Sneak Kills.
Stunned an enemy standing in water using a Shock Bolt.
Acquired the Warden Crossbow.
Took the plunge back into STEM.