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