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.
Opened all lockers.
Opted for a cinematic experience.
Collected all files.
Stopped a true believer from playing with his favorite toy. (Ch. 11)
Experienced every traumatic encounter and made peace with your inner demons.
Acquired all standard weapons.
Completely upgraded all weapons.
Crafted every type of item at least once.
Avoided unnecessary bloodshed outside City Hall. (Ch. 5)
Completely upgraded all abilities.
Talked to Kidman about all of the photographic slides.
Collected all of the Mysterious Objects.
Stunned an enemy standing in water using a Shock Bolt.
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.
Killed 3 enemies using upgraded Smoke Bolts.
Your trauma is no more.
Brought your own equipment to the barbecue this time. (Ch. 14)
Made it inside the enemy's stronghold.
Upgraded one of your Warden Crossbow bolts to max level.
Came to terms with your past and present.
Reminisced about every moment from your past. (Ch. 12)
Provided a Harbinger sweet release.
Stomped and killed 15 fallen enemies.
Completed the "The Last Step" side mission.
Opened 16 lockers.
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 oil on the ground.
Killed 2 or more enemies at once using a hanging lamp. (Ch. 9)
Shut down a bloody performance.
Upgraded a weapon to Level 3.
Collected 20 files.
Found a potential ally in The Marrow.
Defeated the Guardian outside City Hall.
Used your first Red Gel.
Saw a chilling vision.
Used your first High-Grade Weapon Parts.
Killed 60 enemies.
Completed the "Rogue Signal" side mission.
Killed an enemy using an Ambush.
Killed 30 enemies.
Killed 10 enemies using Sneak Kills.
Acquired the Warden Crossbow.
Crafted something for the first time.
Took the plunge back into STEM.