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