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