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.
Reminisced about every moment from your past. (Ch. 12)
Stopped a true believer from playing with his favorite toy. (Ch. 11)
Killed 2 or more enemies at once using a hanging lamp. (Ch. 9)
Avoided unnecessary bloodshed outside City Hall. (Ch. 5)
Stomped and killed 15 fallen enemies.
Opted for a cinematic experience.
Collected all of the Mysterious Objects.
Killed 3 enemies using upgraded Smoke Bolts.
Brought your own equipment to the barbecue this time. (Ch. 14)
Opened all lockers.
Completely upgraded all weapons.
Collected all files.
Used every Coffee Maker at least once.
Observed all Residual Memories.
Talked to Kidman about all of the photographic slides.
Killed 2 or more enemies at once using oil on the ground.
Completely upgraded all abilities.
Crafted every type of item at least once.
Opened 16 lockers.
Stunned an enemy standing in water using a Shock Bolt.
Acquired all standard 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.
Killed an enemy using an Ambush.
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.
Upgraded a weapon to Level 3.
Found a potential ally in The Marrow.
Collected 20 files.
Defeated the Guardian outside City Hall.
Upgraded one of your Warden Crossbow bolts to max level.
Saw a chilling vision.
Completed the "Rogue Signal" side mission.
Used your first Red Gel.
Killed 60 enemies.
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.