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.
Brought your own equipment to the barbecue this time. (Ch. 14)
Made it inside the enemy's stronghold.
Completed the "The Last Step" side mission.
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.
Survived an ordeal with the help of a new friend.
Shut down a bloody performance.
Found a potential ally in The Marrow.
Collected 20 files.
Defeated the Guardian outside City Hall.
Completely upgraded all abilities.
Saw a chilling vision.
Killed 3 enemies using upgraded Smoke Bolts.
Killed 60 enemies.
Completed the "Rogue Signal" side mission.
Upgraded one of your Warden Crossbow bolts to max level.
Used your first Red Gel.
Opened all lockers.
Opened 16 lockers.
Killed 30 enemies.
Acquired the Warden Crossbow.
Crafted something for the first time.
Upgraded a weapon to Level 3.
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.
Completely upgraded all weapons.
Crafted every type of item at least once.
Observed all Residual Memories.
Collected all files.
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.
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.
Killed 10 enemies using Sneak Kills.
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)
Opted for a cinematic experience.