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.
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)
Talked to Kidman about all of the photographic slides.
Made it inside the enemy's stronghold.
Completed the "The Last Step" side mission.
Came to terms with your past and present.
Reminisced about every moment from your past. (Ch. 12)
Stomped and killed 15 fallen enemies.
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.
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.
Opened 16 lockers.
Upgraded a weapon to Level 3.
Killed 2 or more enemies at once using oil on the ground.
Found a potential ally in The Marrow.
Used your first Red Gel.
Collected 20 files.
Defeated the Guardian outside City Hall.
Stunned an enemy standing in water using a Shock Bolt.
Saw a chilling vision.
Killed 60 enemies.
Killed an enemy using an Ambush.
Completed the "Rogue Signal" side mission.
Used your first High-Grade Weapon Parts.
Killed 30 enemies.
Acquired the Warden Crossbow.
Killed 10 enemies using Sneak Kills.
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.
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.
Collected all files.
Opened all lockers.
Acquired all standard weapons.
Killed 3 enemies using upgraded Smoke Bolts.
Avoided unnecessary bloodshed outside City Hall. (Ch. 5)
Opted for a cinematic experience.