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.
Acquired all standard weapons.
Completed the game on Nightmare difficulty or higher.
Completed the game in Classic Mode.
Brought your own equipment to the barbecue this time. (Ch. 14)
Completely upgraded all weapons.
Used every Coffee Maker at least once.
Opened all lockers.
Reminisced about every moment from your past. (Ch. 12)
Killed 3 enemies using upgraded Smoke Bolts.
Stomped and killed 15 fallen enemies.
Stopped a true believer from playing with his favorite toy. (Ch. 11)
Observed all Residual Memories.
Opted for a cinematic experience.
Killed 2 or more enemies at once using a hanging lamp. (Ch. 9)
Completely upgraded all abilities.
Avoided unnecessary bloodshed outside City Hall. (Ch. 5)
Crafted every type of item at least once.
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.
Collected all of the Mysterious Objects.
Did what needed to be done to save your daughter.
Reached the very end of the world.
Your trauma is no more.
Collected all files.
Made it inside the enemy's stronghold.
Opened 16 lockers.
Upgraded one of your Warden Crossbow bolts to max level.
Talked to Kidman about all of the photographic slides.
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.
Killed an enemy using an Ambush.
Defeated the Guardian outside City Hall.
Saw a chilling vision.
Used your first High-Grade Weapon Parts.
Stunned an enemy standing in water using a Shock Bolt.
Used your first Red Gel.
Killed 60 enemies.
Acquired the Warden Crossbow.
Killed 30 enemies.
Completed the "Rogue Signal" side mission.
Killed 10 enemies using Sneak Kills.
Crafted something for the first time.
Took the plunge back into STEM.