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.
Opened all lockers.
Collected all of the Mysterious Objects.
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.
Completely upgraded all weapons.
Avoided unnecessary bloodshed outside City Hall. (Ch. 5)
Completely upgraded all abilities.
Killed 3 enemies using upgraded Smoke Bolts.
Opened 16 lockers.
Opted for a cinematic experience.
Upgraded one of your Warden Crossbow bolts to max level.
Killed 2 or more enemies at once using oil on the ground.
Stomped and killed 15 fallen enemies.
Killed an enemy using an Ambush.
Crafted every type of item at least once.
Acquired all standard weapons.
Completed the game on Casual difficulty or higher.
Completed the game on Survival difficulty or higher.
Completed the game on Nightmare difficulty or higher.
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.
Brought your own equipment to the barbecue this time. (Ch. 14)
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.
Provided a Harbinger sweet release.
Experienced every traumatic encounter and made peace with your inner demons.
Completed the "The Last Step" side mission.
Survived an ordeal with the help of a new friend.
Killed 2 or more enemies at once using a hanging lamp. (Ch. 9)
Shut down a bloody performance.
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.
Killed 60 enemies.
Completed the "Rogue Signal" side mission.
Killed 30 enemies.
Upgraded a weapon to Level 3.
Used your first High-Grade Weapon Parts.
Stunned an enemy standing in water using a Shock Bolt.
Acquired the Warden Crossbow.
Killed 10 enemies using Sneak Kills.
Crafted something for the first time.
Took the plunge back into STEM.