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