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.
Acquired all standard weapons.
Crafted every type of item at least once.
Opted for a cinematic experience.
Collected all of the Mysterious Objects.
Brought your own equipment to the barbecue this time. (Ch. 14)
Observed all Residual Memories.
Opened all lockers.
Opened 16 lockers.
Collected all files.
Talked to Kidman about all of the photographic slides.
Reminisced about every moment from your past. (Ch. 12)
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.
Killed 2 or more enemies at once using a hanging lamp. (Ch. 9)
Killed an enemy using an Ambush.
Killed 10 enemies using Sneak Kills.
Avoided unnecessary bloodshed outside City Hall. (Ch. 5)
Killed 3 enemies using upgraded Smoke Bolts.
Completely upgraded all weapons.
Completed the game on Casual difficulty or higher.
Completed the game on Survival difficulty or higher.
Completed the game on Nightmare 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.
Completed the "The Last Step" side mission.
Came to terms with your past and present.
Provided a Harbinger sweet release.
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.
Upgraded one of your Warden Crossbow bolts to max level.
Completely upgraded all abilities.
Collected 20 files.
Found a potential ally in The Marrow.
Defeated the Guardian outside City Hall.
Stomped and killed 15 fallen enemies.
Stunned an enemy standing in water using a Shock Bolt.
Used your first Red Gel.
Saw a chilling vision.
Upgraded a weapon to Level 3.
Completed the "Rogue Signal" side mission.
Acquired the Warden Crossbow.
Killed 60 enemies.
Killed 30 enemies.
Used your first High-Grade Weapon Parts.
Crafted something for the first time.
Took the plunge back into STEM.