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.
Reminisced about every moment from your past. (Ch. 12)
Stopped a true believer from playing with his favorite toy. (Ch. 11)
Completely upgraded all weapons.
Completely upgraded all abilities.
Acquired all standard weapons.
Killed 2 or more enemies at once using oil on the ground.
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.
Completed the game on Nightmare difficulty or higher.
Collected all of the Mysterious Objects.
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.
Collected all files.
Made it inside the enemy's stronghold.
Killed 3 enemies using upgraded Smoke Bolts.
Upgraded one of your Warden Crossbow bolts to max level.
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.
Killed 2 or more enemies at once using a hanging lamp. (Ch. 9)
Shut down a bloody performance.
Stomped and killed 15 fallen enemies.
Upgraded a weapon to Level 3.
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)
Saw a chilling vision.
Killed 60 enemies.
Used your first High-Grade Weapon Parts.
Completed the "Rogue Signal" side mission.
Used your first Red Gel.
Killed 30 enemies.
Killed an enemy using an Ambush.
Killed 10 enemies using Sneak Kills.
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.