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