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