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.
Collected all files.
Completely upgraded all weapons.
Collected all of the Mysterious Objects.
Opened all lockers.
Brought your own equipment to the barbecue this time. (Ch. 14)
Crafted every type of item at least once.
Talked to Kidman about all of the photographic slides.
Reminisced about every moment from your past. (Ch. 12)
Stopped a true believer from playing with his favorite toy. (Ch. 11)
Used every Coffee Maker at least once.
Killed 2 or more enemies at once using a hanging lamp. (Ch. 9)
Completely upgraded all abilities.
Opened 16 lockers.
Killed 3 enemies using upgraded Smoke Bolts.
Defeated the Guardian outside City Hall.
Observed all Residual Memories.
Killed 2 or more enemies at once using oil on the ground.
Upgraded one of your Warden Crossbow bolts to max level.
Opted for a cinematic experience.
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.
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.
Collected 20 files.
Stomped and killed 15 fallen enemies.
Stunned an enemy standing in water using a Shock Bolt.
Found a potential ally in The Marrow.
Avoided unnecessary bloodshed outside City Hall. (Ch. 5)
Used your first Red Gel.
Upgraded a weapon to Level 3.
Killed 60 enemies.
Saw a chilling vision.
Used your first High-Grade Weapon Parts.
Killed an enemy using an Ambush.
Killed 10 enemies using Sneak Kills.
Completed the "Rogue Signal" side mission.
Killed 30 enemies.
Acquired the Warden Crossbow.
Crafted something for the first time.
Took the plunge back into STEM.