Prey 2017 100% Achievement Guide

Prey 100% achievement guide.
All collectibles: TranScribes, missing persons, e-mails, wepon upgrades and more! All in one place.

If you like my videos please at least give them thumbs up, it really helps me a lot and don't cost you anything.

Italian version

Here's an Italian verion of this guide thanks to my friend DandyDude

https://steamcommunity.com/sharedfiles/filedetails/?id=2232409421

Introduction

Her's few things you'll need to know before you start.

I sugest to buy only human powers in your first pleythrough.
This will help you get in to closed rooms, hack computers for emails and repair stuff. You also need Gunsmith skill level III to fully upgrade a weapon.

Don't waste neuromods on Leverage skill, you can remove any heavy obstructions with recycler charges. Just be carefull not to recycle any dead bodies.

After getting to Psychotronics try to always have 20 neuromods on you, this will allow you to get all Typhon power related achievements. Just Save your game before attempting one, buy necessary power, do achievement and reload your save.

In another playthrou don't buy any powers and make manual save before last quest.
Buy any Typhon power and finish the game to finish will all Typhon powers to get Split Affinity achievement. Reload save and finish the game again with no powers to get No Needles achievemnt.

Unfortunetly you can't reload it again and get all Human powers ending for Split Affinity but if you follow my guide you already have it.

I will add videos as I go through the game.

A Different Side of Yu

You scanned your Phantom Shift duplicate with the Psychoscope.

To get this achievement you'll need Phantom Shift power. Level I if you have chipset for fast scan or level II if you don't. Use the power and turn around to scan your dubble.

Abandon Ship

You fled Talos I aboard Alex's escape pod before completing your mission.

First you will need escape pod key card which you can find in Alex Yu apartment in Crew Quarters. Escape pod is located in Arboretum. To get inside you will need Hacking IV to unlock computer in Alex Yu office. Get inside the pod and start launching sequence.

Adrift

You rescued Dr. Igwe from a cargo container.

After you get out of Deep Storage side mission "Rescue Dr. Igwe" will start. It's a timed event and if you fail it you will miss the achievement. Goal here is to save Dr. Igwe trapped in the container.
All you need is the number of the container witch then you must put in cargo bay computer and dock it. This will unlock the achievement.

Awkward Ride Home

You escaped Talos I aboard Dahl’s shuttle with only Dahl.

To get this achievement you must kill everyone except Dahl and perform an apto-regressive neurotomy on him.

Ball Lightning

You used Electrostatic Burst to drop two or more Operators at once.

Buy Electrostatic Burst Typhon III power, find 2 Operators near each other and blast them with this power.
There's a lot of opportunities to do this later in the game.

Best Served Cold

You killed Luka and avenged Abby.

You can find Luka in Crew Quarters cafeteria posing as Will Mitchell. Save the game, kill him and achievement is yours. Then load the game.

Black Market

You found all the smuggler's dead drops.

Get TranScribe off of Lily Morris body in Arborwtum and listen to it to start Smugglers Ring quest.
There are 6 dead drops hidden in Talos I station. You can locate them by looking for an alarm bell with red light lit above it.

Brain Trust

You helped Igwe, January, and Mikhaila meet in your office.

You will meet January as part of the story, just don't kill him (or kill him for an achievement and reload).
You will run in to Dr. Igwe after Deep Storage. He will be floating in space in a cargo container. Save him (see Adrift).
Mikhaila is in Power Plant and need medicine. Give it to her and she will be later in your office.

Coffee Break

You found Dr. Calvino's secret stash.

During mission Through a Glass Darkly you will get acces to Dr. Calvino's looking glass workshop in Hardware Labs area. In it you will find Dr. Calvino’s Tumbler. Right nest to the stairs there's a small table with a heater or something on it. Put the tumbler on i to unlock secret stash.

Cold Dead Hands

You fully upgraded a weapon.

Check out Missing Perosns section for videos with Wepon Upgrade kits locations.

Dead Calm

You killed an enemy while using Combat Focus.

Simply buy Combat Focus and kill anything while it's active.

Dear Future Self

You found and listened to all the messages you left for yourself.

To get this achievement you have to listen to 11 recordings.
3 of those are unmissable parts of the story.
There are 6 audio recordings on Morgan Yu computer in Crew Quarters.
Finally there is on TranScribe hidden in Alex Yu office in Arboretum and final TranScribe in Alex Yu bunker at the end of the game.

Deprogramming

You used Mindjack to free a mind-controlled Human.

To get this achievement you need power Mindjack. Scan mind controlled humans to unlock it.
Once you buy it use it on mind controlled human.

Do No Harm

You completed the game without killing any Humans.

Engineer

You repaired (20) objects on and around Talos I.

Plenty of opportunities to repair stuff out there.

Escape Velocity

You blasted yourself as an object for at least 20 meters while in normal gravity.

One of the best spots to do this is in Arboretum. You gonna need two typhon powers, Morph I and Kinetic Blast I. Get as high as you can, preferably up to the Alex Yu office. Then drop a small object, take its form and blast yourself over the edge with Kinetic Blast. You need to fly for 20 meters for achievment to unlock.

Facsimile

You met January for the first time.

Story related and can't be missed.

Gift to the World

You found Gustaf Leitner’s Connectome for Dr. Igwe.

Late in the game, after you save Dr.Igwe he will contact you and give you a side quest “Gustav Leitner”. This will happen near Crew Quarters entrance in Arboretum.
Simply complete this quest.

I and It

You killed every Human on and around Talos I.

I and It Achievement / Trophy Guide - You killed every Human on and around Talos I.

To get this achievement everyone must die by your hand.
You will void the achievement if mind controlled enemy explodes, dies on enviroment damage, gets killed by typhon or turret. You must kill them yourself so the best way to do it is to stun them first and then kill them with a wrench. To be sure check out bodies after you shoot them from the distance. If there's no head it's probably best to reload save.
You can check your stats to see if you got the kill.
First 36 people have to die before Dhal arrives on the station. He will give you a side quest "Showing Initiative" during witch you will have to kill 4 more mind-controlled people.
If he don't give you this quest you left someone alive, reload save.

I and Thou

You completed the game in the most empathetic manner possible.

To get this you need +4 empaty poitns at the end of the game.

Requirement	Empathy
Save Dahl (“Incapacitate Dahl” completed)	+1
Rescue Dr. Igwe (see trophy Adrift)	+1
Save Alex Yu (Arboretum area)	+1
Complete “Dahl’s Ultimatum”	+1
Complete “Assist Mikhaila Ilyushin”	+1
Complete “Mikhaila’s Father”	+1
Complete “Escape Attempt”	+1
Complete “Gustav Leitner”	+1
Complete “Help Luther Glass”	+1
Complete “Danielle Sho”	+1
Use Mindjack Typhon power to save 10 Mind-Controlled Humans	+1
Become Psychopathic by killing Sarah Elazar, Dr. Igwe and Mikhaila	-100
Kill Aaron Ingram	-1
Kill Alex Yu	-2
Kill Dr. Igwe	-2
Kill Mikhaila Ilyushin	-2
Kill Sarah Elazar	-2
Let Aaron Ingram die in Psychotronics	-1
Let Dr. Igwe die (fail to do Adrift trophy)	-1
Let Mikhaila Ilyushin die in Power Plant	-1
Let Sarah Elazar die in Cargo Bay	-1

Intrinsic Value

You recycled yourself.

Very simple. Once you get recycling charge throw it under your feet.

It's Alive!

You created a Phantom using Phantom Genesis.

Simply buy Phantom Genesis power and use it on dead body to unlock this achievement.

Know Thine Enemy

You acquired a Typhon power.

Know Thy Self

You acquired a Human ability.

Makeup Exam

You returned to the Simulation Lab and completed the tests in Rooms A, B, and C.

For this one you will have to buy Mimic Matter I, Kinetic Blast I and Remote Manipulation I. Get back to the test rooms located in Neuromod Division area and complete test using those powers.

Mimesis

You mimicked a Mimic.

For this one you gonna need Psychoscope upgrade Mimic Detection Gen 1 (you will get it during mission “Detour”) and Mimic Matter typhon power (scan Mimics to get it).
Locate mimic posing as an item and mimic that item using Mimic Matter power.

Mimic Massacre

You killed (5) Mimics in 5 seconds.

There is a bunch of mimics in Lab A in Psychotronics area.
Use Typhon Lure to get them all in one place and then kill them with recycler charge.

Missing Persons

You located all employees on Talos I.

This will be a long section as there are a lot of collectibles to find in this game. Fortunately you don't need to find ALL missing persons, mails and audio logs. I unlocked those achievements after finding about 90-95% of those so ther's a slight margin for error.

Some sections are divided in two parts. That's because you can't get everywhere at first and you have to get to the area later. So if you can't get to a collectible just play the game and get back to it when you upgrade your skills or when you get necessary keycard or password.

In my videos you will find locations of missing persons, emails, weapon upgrade kits, neuromods, chipsets, fabrication plans, passwords, passcodes and keycards and transcribes. At least those I found but that's more than enough for Cold Dead Hands, Missing Persons, Press Sneak, Psychometry and some power related achievements.

Neuromod Division

Divya Naaz
Frederick Steele
Grete Mikkelsen
Hadley Dalton
Halden Graves
Helen Croft
Jiao-Long Heng
John Haskins
Joshua Vanstry
Jovan Gravilovic
Junior Bookman
Natasha Nikova
Patricia Varma
Rich Ivers
Robert Gage
Tina Snow
Veer Singh
V-010255-01
V-041255-00
V-110655-16

Talos I Lobby

Alice Aiken
Anna Goldcrest
April McGuire
Beth Ino
Bianca Goodwin
Demetri Bowser
Elias Black
Garfield Langly (Phantom )
Harley Grainger
Hendrik DeVries
Jason Chang
Joel Weeks
Kelly Randolph
Laura McAvoy
Lucia Jimenez
Luther Glass
Martin Giroud
Maxine Ford
Mishca Lavarev
Nash Underwood
Octavia Figgs
Randolf Hutchinson
Richard Coveney
Steve Folson
Trevor J. Young (Mind-Controlled )
Yuri Kimura (Phantom )

Hardware Labs

Aime Schmidt
Clive Lawrence (Phantom )
Conrad Birchman
Franklin Goode
Gregory Kepner
Hope Ellis
Jorgen Thorstein (Phantom )
Lane Carpenter (Phantom )
Lorenzo Calvino
Miyu Okabe
Nickie Tannar
Peter Coleman
Randall Wood
Sean Larsen
Thaddeus York
Titus Kromwell

Talos I Exterior

Dr. Igwe (if you rescue him he will show up in Cargo Bay)
Emmanuel Mendez
Grant Lockwood
Hunter Hale
Jessica Wiley (shows up in Cargo Bay first and later in Talos I Exterior)
Jose Costa
Karisma Chouhan
Mariana Arias
Mike Devlin
Riley Butler (shows up in Cargo Bay first and later in Talos I Exterior)
Tana Vale (shows up in Cargo Bay first and later in Talos I Exterior)
V-011155-17
V-060155-05
V-071855-21 (Zhao Sun)
V-110655-27 (Adrain Holland)

Psychotronics

Allison Brady
Andrea Hudson
Annalise Gallegos
Cory Richard
Crispin Boyer (Phantom )
Demian Linn
Evan Avery
Hans Kelstrup
Helen Barker-Combs (Phantom )
Janos Jozsef
Kristine Lloyd
Mitsuo Takaji
Otta Lauda
Rory Manion
Ruby Stone
Sanjay Puri
Steven Mueller
Sylvain Bellamy
V-052255-01
V-052255-02
V-080354-01
V-090655-13 (Aaron Ingram)
V-091755-03
V-091855-04
V-103155-06 (Jordan Yax)
V-111754-03
V-122255-07
V-122854-12

G.U.T.S.

Alika James
Anders Kline
Brittany LaValley
Edward Douglas
Eric Berger
Josh Dalton
Kimberly Bomo
Laurel Davis
Ramon Ridley

Aboretum

Alejandro Mata
Alex Yu (only at the end of main mission “The Keys to the Kingdom”)
Carin Buckley
Edna Burton
Elle Gold
Evelyn McCarthy
Gennady Mironov
Iris Stein
Jenny King
Jia Kyung-Ho
Julien Howard
Lawrence Baxter (Phantom)
Lily Morris
Lizzy Colton
Marc Sellers
Marietta Kyrkos
Mickey Pitt Sr. (Mind-Controlled)
Rani Chaudhary (Mind-Controlled) - save her for passcode.
Rodney S. Poole
Thomas Tucker
Zachary West

Crew Quarters

Abigail Foy
Argenteno Pero (Phantom)
Bernard Griffith (Mind-Controlled)
Brandi Pester
Bruce Cobb
Caleb Hawethorne (Mind-Controlled)
Carlos Popinga (Mind-Controlled)
Chloe Burgess
Chris Wade
Clarke Raffirty
Colette May-Shutlz
Daisy White
Dan Billingsly
Daniel London (Mind-Controlled)
Danielle Sho (Tracking Bracelet)
David Branch (Mind-Controlled)
Don Davis
Elizabeth Bay
Emma Beatty (Mind-Controlled)
Eve Coolidge
Franz Klinger (Mind-Controlled)
Gary Snow (Mind-Controlled)
Guy Jameson
Harvey Clausen (Mind-Controlled)
Ike Stewart (Mind-Controlled)
Indigo Lake (Mind-Controlled)
Ivy Song (Phantom)
Jillian Quigg (Mind-Controlled)
Joseph McSorley
Kade Mason
Kevin Sabian
Keira Whitman
Lia Macy
Lisa Larson (Mind-Controlled)
Maliah Fowles
Mary Malinaro (Mind-Controlled)
Mathias Kohl
Mike Turner
Neil Warnes
Nicole Hague (Phantom) - spawns only when located with security station
Oliver Benoit (Mind-Controlled)
Patricia Wang
Phong Vu (Mind-Controlled)
Regina Sellers (Phantom)
Salman Kapoor (Mind-Controlled)
Thomas Lutz
Vincent Schubel (Mind-Controlled)
Will Mitchell (Tracking Bracelet)
V-010655-37 (Luka Golubkin)

Deep Storage

Akande Benin
Andrew Grey
Heather Bentz
Jennifer Lee
Lyn Cloyer
Mary Page

Cargo Bay

Alfred Rose
Ash Lasair
Austin Cool
Christopher Smith
Darcy Maddox
Diane Washington
Ekaterina Mulsaev
Enoch Kouneva (Phantom)
Gerald Wildman
Gus Magill
Kevin Hague
Quinten Purvis
Sam Hertz
Sarah Elazar
Tamiko Hayashi

Life Support

Alan Bianchi
Alton Weber
Angela Diaz
Anong Lao
Ari Liudnarht
Augusto Vera
Carol Sikes
Cynthia Dringus
Emily Carter
Erica Teague
Hank Majors
Johnny Brungen
Kane Rosito
Kirk Remmer (Phantom)
Max Weigel-Goetz
Pablo Meyers
Penny Tennyson
Price Broadway
Raya Leiruat
Roger Meir
Tobias Frost
Umi Isaka

Power Plant

Brenda Cabrera
Duncan Krassikoff
Guy Croal
Ian Rolston
Jean Faure
Lan Nguyen
Matthew Connolly
Miguel Lopez
Mikhaila Ilyushin
Nicholas Stillwater
Talia Brooks

Shuttle Bay

Anastacia Uriegas
Blaine Cooly
David Simmonds
Donald “Skipper” Hail
Drew Springer
Eddie Voss
Emmanuella DeSilva - tracked her via a security station BEFORE duing Escape Attempt quest
Frank Jones - tracked him via a security station BEFORE duing Escape Attempt quest
Galel Seif
Leon Woods
Lloyd Thompson
Mary Stevens
Mia Bayer
Nils Kjaergaard
Rodrigo Diaz
Scott Parker
Todd Matsuyama
Tom “Buzz” Cooper

Talos I Bridge

Bill Nixon-Greene
Gordon Bitz
Izumi Minami
Jada Marks
Matt Cothron
Omar Bolivar
Perry Fullbright
Sadie Hall
Skye Braxton
Spencer Ogden
Stone Blanchard

No Needles

You completed the game without ever acquiring any Typhon power or Human ability.

No Show

You died to helicopter blades on your first day on the job.

Simply kill yourself on helicopters rotor just at the start of the game.

Open Says She

You used Danielle's voice samples to access Deep Storage.

Story related and can't be missed.

Operator

You hacked at least (20) hackable objects on and around Talos I.

A lot of opportunities to hack something arond Talos I.

Press Sneak

You read all the e-mails on Talos I.

See Missing Persons section for all collectibles.

Prism Master

You read the entire Starbender series and don't regret it.

Starbender books are placed all over the Talos I but you can find. Only 6th and the last book is always in Alex Yu’s suite in the Crew Quarters.

Psychometry

You found and listened to all TranScribe recordings.

See Missing Persons section for all collectibles.

Push the Fat Guy

You killed Alex.

At the end of the game you will finaly meat Alex in person. Stun him so he don't run and kill him.

Reduce, Reuse, Recycle

You used a single Recycler Charge to recycle at least 20 objects.

You can get this one easily in Ballistics Lab located in Hardware Labs area. Throw recycler charge in the same spot I;m throwing in the video. If you have any problems you can always save game, drop 20 unique items from your inventory to the ground, recycle them with recycler charge and load your game.

Self-Incriminating

You found out what happened to Mikhaila's father and let her know.

Unlocks after completing Mikhaila’s entire quest chain.

Shapeshifter

You mimicked (20) or more unique objects.

Obviously you gonna need Mimic Matter typhon power for this. Find a place with a lot of small items and start mimicking them. Make sure you have a good supply on Psi hypos on you. If you run out of objects to mimic drop small items from your inventory.

Split Affinity

You completed the game once acquiring only Typhon Powers and again acquiring only Human abilities.

During your first playthrough get only human abilities and get all collectibles related achievements. On your second playthrough don't buy any powers and save your game before starting last quest. Finish game without powers for No Needles achievement, reload save, buy any typhon power and finish Prey one more time to unlock this one.

Suicide by Proxy

You killed January.

January is an operator you will meet as a part of the story. Save your game, kill him and load your save. Easy as that.

Tee One Up

You killed an enemy while they were Lifted.

Very simple. Buy Lift Field I Typhon power and kill enemy while he is lifted by it.

The Gates of Hell

You completed the Shipping and Receiving objective and no human lives were lost.

This can only be done during “Cargo Bay Defenses” mission.

You will be asked to place 3 turrets near the dooor to Cargo Bay B. Make a save before opening the door. It's not that hard, as soon as you open the door throw Typhon Lure inside and unload everything you have at aliens. I don't recommend useing Recycler Charge becouse ther's one named phantom inside needed for Missing Persons achievement, Just kill Typhons as quickly as you can and if you have problems you can always lower the difficulty in menu even during a playthrough.

This Never Happened

You performed an apto-regressive neurotomy on Dahl.

Late in the game guy named Dahl will come to Talos I but first you need to save Dr. Igwe (see achievement Adrift). If you do he will give you a quest to capture Dahl alive. Dahl is hiding in Atmosphere Control in Life Support. Stun him with a disruptor gun and go to Neuromod Division for next transmission from Igwe.
Finish this side quest and achievement will unlock.

Thoughts Can Kill

You used Psychoshock on a Human.

To unlock Psychoshock typhon power scan Phantoms or mind-controlled humans. Then kill a mind-controlled human with this power. Easy to do in Crew Quarters.

TranStar Gourmand

You consumed one of every type of food and drink on Talos I.

Just eat everything you find and it will pop up.

Here's the list of everything

Food:
Methuselah Apple
Sunburst Banana
Sun-Dried Tomata Jerky
Russian Blinis
Moonshade Lemon
Jamon Tomato
Big Bang Candy
Captain Spree’s Fish Sticks
Jellied Eels
Siskak Unagi Rollz
Udon Noodles
Veggie Blend
Spiralite Cookies
Skyking Pomegranate:
Ossetra Caviar
RanDom Dim Sum
Sunburst Banana Pudding
Shaker Lemon Pie
Crispy Frites:
Glucassist!

Drinks:
Kings & Way Sprinkling Water
Cold Mountain Green Tea
Duck Beer
PopStar
Old Sardar Bourbon
Kafe Karsk
Pomegranate Moonshine
Tamizdat Vodka

You Rang?

You used the Psychotronics satellite to dismiss or summon the Typhon Nightmare.

To unlock this you need to complete side quest "Mixed Signals" and to get that quest Nightmare has to spawn to hunt you. During my playthrough one spawned late in the game after I already killed 7 Nightmares roaming around Talos I. You can also spawn one by buying 3 typhon powers. 10 or so minutes after you kill it January will give you a quest to repair a communication satelite. For this you will need Repair III skill and after you compleat this quest you will get 2 audio logs, one to summon a Nightmare and one to dismiss it. Simply play them from your data tab. You can use them limited number of times but first summon will give you the achievement.

How to find KASPAR

I've seen that many people have problem locating KASPAR.
Here's a short video to help you with that.

How to get inside I.T. Supply Closet

To get inside I.T. Supply Closet first you need to kill 36 people before Dhal arrives (check out my I and It video).
This way he will give you a side quest "Showing Initiative" in witch you have to kill 4 mind-controlled people. One of them will have I.T. Supply Closet Key Card.

My other guides

If you liked this guide check out my other work

http://steamcommunity.com/sharedfiles/filedetails/?id=959140649
http://steamcommunity.com/sharedfiles/filedetails/?id=950413713
http://steamcommunity.com/sharedfiles/filedetails/?id=931992932
http://steamcommunity.com/sharedfiles/filedetails/?id=919415716
http://steamcommunity.com/sharedfiles/filedetails/?id=857469406
http://steamcommunity.com/sharedfiles/filedetails/?id=798071947
http://steamcommunity.com/sharedfiles/filedetails/?id=785220444
http://steamcommunity.com/sharedfiles/filedetails/?id=779159062
http://steamcommunity.com/sharedfiles/filedetails/?id=775355787
http://steamcommunity.com/sharedfiles/filedetails/?id=720373542

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http://steamcommunity.com/sharedfiles/filedetails/?id=677905481
http://steamcommunity.com/sharedfiles/filedetails/?id=670409066
http://steamcommunity.com/sharedfiles/filedetails/?id=660905473
http://steamcommunity.com/sharedfiles/filedetails/?id=607493540
http://steamcommunity.com/sharedfiles/filedetails/?id=607447155
http://steamcommunity.com/sharedfiles/filedetails/?id=585560379
http://steamcommunity.com/sharedfiles/filedetails/?id=539164153
http://steamcommunity.com/sharedfiles/filedetails/?id=538022803
http://steamcommunity.com/sharedfiles/filedetails/?id=538020184
http://steamcommunity.com/sharedfiles/filedetails/?id=513512198

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http://steamcommunity.com/sharedfiles/filedetails/?id=191045875
http://steamcommunity.com/sharedfiles/filedetails/?id=187580414
http://steamcommunity.com/sharedfiles/filedetails/?id=180521781
http://steamcommunity.com/sharedfiles/filedetails/?id=180143513
http://steamcommunity.com/sharedfiles/filedetails/?id=166022923
http://steamcommunity.com/sharedfiles/filedetails/?id=129865306
http://steamcommunity.com/sharedfiles/filedetails/?id=129617693
http://steamcommunity.com/sharedfiles/filedetails/?id=128325823
http://steamcommunity.com/sharedfiles/filedetails/?id=128052419
http://steamcommunity.com/sharedfiles/filedetails/?id=123720694

.

http://steamcommunity.com/sharedfiles/filedetails/?id=496772876
http://steamcommunity.com/sharedfiles/filedetails/?id=490794075
http://steamcommunity.com/sharedfiles/filedetails/?id=233047117
http://steamcommunity.com/sharedfiles/filedetails/?id=232988062
http://steamcommunity.com/sharedfiles/filedetails/?id=217856798

[Mesjaf]

I don't remember but you need two playthroughs anyway.

[Alex Helders]

Thanks, Mesjaf. I will refer to it when going for the achievements. Do you know if there is a point of no return in this game where I can't go back and complete achievements such as the missing persons achievement? Thanks.

[Mesjaf]

Alex use Pray playlist https://www.youtube.com/playlist?list=PL6gLdnVOCnjVUNRGfjX_jjSlOpDiEsngE Videos there are more or less in order I got the achievements. Here they are in alphabetic order so people can find what they're looking for more easily.

[Alex Helders]

Would be cool if the achievements were in order of suspected completion.

[Hodeken]

Split Affinity can be done on one profile, well sorta. Assuming you did the game completing the no needles challenge and made a save before the ending. Just go to an emtpy profile folder in the the save folder Users\'user name'\Saved Games\Arkane Studios\Prey\SaveGames and delete everything in it. Then copy the content from the profile you already did human/typhon side on, and delete the file called "NewGamePlus.arkend". Load up the game and make sure you dont press continue but load a/the save before having aquired any abilities. I wouldnt have found that out if they wrote "You completed the whole game once acquiring only Typhon Powers and again acquiring only Human abilities." because words have meaning, when will people start understanding that?

[Squatterboy64]

This Never Happened

You performed an apto-regressive neurotomy on Dahl.
Stun him with a disruptor gun


clearing the fan and getting rid of the oxygen in that room knocks him out as well

[Perfice]

I eventually got it after trying at least 10 times. I think the achievement is bugged. Whether they die or not is irrelevant, as it's one of the first things I tried. (Lowering their health with a pistol and then blasting them for the killshot.) I'm not sure if it even matters if you upgrade it all the way.

I watched several videos and read a bunch of guides on it. I know it wasn't an error on my part. A few other people mentioned it didn't trigger for them the first time either, but they blamed it on their own personal error. Like I said, I know for a fact I was doing what was required and it still wasn't triggering after multiple tries.

[Mesjaf]

If you killed them both and didn't get it maybe it's a bug or something. It's pretty straightforward achievement and ther's no trick to it.
You can try damaging them a bit before using this power to be absolutely sure they will die.

[Perfice]

Fully upgraded it. Used to drop Dahl's military operators. No achievement.
Tried twice more and made sure the operators were right next to each other. No achievement.

[Mesjaf]

It's right there in the video :) At 0:25.
But I will update description ass well.