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