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.
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)
Collected all files.
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)
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.
Stomped and killed 15 fallen enemies.
Killed 2 or more enemies at once using a hanging lamp. (Ch. 9)
Shut down a bloody performance.
Upgraded a weapon to Level 3.
Stunned an enemy standing in water using a Shock Bolt.
Found a potential ally in The Marrow.
Collected 20 files.
Avoided unnecessary bloodshed outside City Hall. (Ch. 5)
Used your first Red Gel.
Saw a chilling vision.
Used your first High-Grade Weapon Parts.
Killed 60 enemies.
Killed an enemy using an Ambush.
Killed 2 or more enemies at once using oil on the ground.
Completed the "Rogue Signal" side mission.
Killed 10 enemies using Sneak Kills.
Killed 30 enemies.
Acquired the Warden Crossbow.
Crafted something for the first time.
Took the plunge back into STEM.
Completed the game on Nightmare difficulty or higher.
Completed the game in Classic Mode.
Defeated the Guardian outside City Hall.
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.
Opened 16 lockers.
Opened all lockers.
Acquired all standard weapons.
Collected all of the Mysterious Objects.
Killed 3 enemies using upgraded Smoke Bolts.
Reminisced about every moment from your past. (Ch. 12)
Opted for a cinematic experience.