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.
Acquired all standard weapons.
Completed the game on Survival difficulty or higher.
Completed the game on Nightmare difficulty or higher.
Completed the game in Classic Mode.
Opened all lockers.
Killed 3 enemies using upgraded Smoke Bolts.
Brought your own equipment to the barbecue this time. (Ch. 14)
Crafted every type of item at least once.
Collected all files.
Reminisced about every moment from your past. (Ch. 12)
Stopped a true believer from playing with his favorite toy. (Ch. 11)
Used every Coffee Maker at least once.
Killed 2 or more enemies at once using a hanging lamp. (Ch. 9)
Completely upgraded all weapons.
Observed all Residual Memories.
Collected all of the Mysterious Objects.
Completely upgraded all abilities.
Upgraded one of your Warden Crossbow bolts to max level.
Stomped and killed 15 fallen enemies.
Stunned an enemy standing in water using a Shock Bolt.
Killed 2 or more enemies at once using oil on the ground.
Opted for a cinematic experience.
Completed the game on Casual difficulty or higher.
Did what needed to be done to save your daughter.
Reached the very end of the world.
Killed an enemy using an Ambush.
Opened 16 lockers.
Talked to Kidman about all of the photographic slides.
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.
Experienced every traumatic encounter and made peace with your inner demons.
Survived an ordeal with the help of a new friend.
Shut down a bloody performance.
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.
Completed the "Rogue Signal" side mission.
Killed 60 enemies.
Crafted something for the first time.
Used your first Red Gel.
Upgraded a weapon to Level 3.
Killed 10 enemies using Sneak Kills.
Killed 30 enemies.
Acquired the Warden Crossbow.
Used your first High-Grade Weapon Parts.
Took the plunge back into STEM.