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.
Acquired all standard weapons.
Completed the game on Nightmare difficulty or higher.
Opted for a cinematic experience.
Collected all of the Mysterious Objects.
Brought your own equipment to the barbecue this time. (Ch. 14)
Observed all Residual Memories.
Opened all lockers.
Collected all files.
Completely upgraded all weapons.
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)
Crafted every type of item at least once.
Avoided unnecessary bloodshed outside City Hall. (Ch. 5)
Completely upgraded all abilities.
Opened 16 lockers.
Upgraded one of your Warden Crossbow bolts to max level.
Killed 3 enemies using upgraded Smoke Bolts.
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.
Talked to Kidman about all of the photographic slides.
Completed the "The Last Step" side mission.
Upgraded a weapon to Level 3.
Came to terms with your past and present.
Provided a Harbinger sweet release.
Experienced every traumatic encounter and made peace with your inner demons.
Used every Coffee Maker at least once.
Survived an ordeal with the help of a new friend.
Stomped and killed 15 fallen enemies.
Shut down a bloody performance.
Used your first Red Gel.
Killed 2 or more enemies at once using oil on the ground.
Found a potential ally in The Marrow.
Collected 20 files.
Defeated the Guardian outside City Hall.
Saw a chilling vision.
Killed 60 enemies.
Completed the "Rogue Signal" side mission.
Used your first High-Grade Weapon Parts.
Killed an enemy using an Ambush.
Killed 30 enemies.
Killed 10 enemies using Sneak Kills.
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.