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.
Brought your own equipment to the barbecue this time. (Ch. 14)
Opened all lockers.
Crafted every type of item at least once.
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)
Completely upgraded all weapons.
Completely upgraded all abilities.
Avoided unnecessary bloodshed outside City Hall. (Ch. 5)
Stomped and killed 15 fallen enemies.
Opted for a cinematic experience.
Completed the game on Casual difficulty or higher.
Completed the game on Survival difficulty or higher.
Completed the game on Nightmare difficulty or higher.
Collected all of the Mysterious Objects.
Did what needed to be done to save your daughter.
Observed all Residual Memories.
Reached the very end of the world.
Your trauma is no more.
Collected all files.
Made it inside the enemy's stronghold.
Talked to Kidman about all of the photographic slides.
Came to terms with your past and present.
Reminisced about every moment from your past. (Ch. 12)
Provided a Harbinger sweet release.
Experienced every traumatic encounter and made peace with your inner demons.
Upgraded one of your Warden Crossbow bolts to max level.
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.
Shut down a bloody performance.
Killed 3 enemies using upgraded Smoke Bolts.
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.
Used your first Red Gel.
Saw a chilling vision.
Upgraded a weapon to Level 3.
Completed the "Rogue Signal" side mission.
Killed 60 enemies.
Killed an enemy using an Ambush.
Stunned an enemy standing in water using a Shock Bolt.
Killed 30 enemies.
Acquired the Warden Crossbow.
Killed 10 enemies using Sneak Kills.
Used your first High-Grade Weapon Parts.
Crafted something for the first time.
Took the plunge back into STEM.