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Atomfall Dr. Holder Lead Guide: Find the Key, Get Sample One, and Escape

A spoiler-forward walkthrough for Dr. Holder’s Atomfall lead: locate the Church Cellar Key, retrieve Sample One, and understand the Garrow choice on his ending route.
Length2 min Posted Quest giverVGSources Team
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Spoilers ahead: This guide covers Dr. Holder’s route through the Sample One lead and a consequential choice involving Garrow, including its outcome.

Find the Church Cellar Key in Medical at the Interchange, use it to meet Holder beneath St. Katherine’s Church, and retrieve Sample One from lower Medical with his keycard. His ending route later involves Poisoned Sample One and Oberon’s fire safety system.

Find the Church Cellar Key in Medical

  1. Enter the Interchange through the Slatten Dale entrance and power Data Store C to reach Medical.
  2. In Medical, look for a nook with a light. Collect the Church Cellar Key and the recording log there.

Meet Dr. Holder at St. Katherine’s Church

Travel to St. Katherine’s Church in Wyndham Village and use the Church Cellar Key on the basement door. Speak with Holder below the church to begin his lead. Pick up the injection sample needle from his desk if you want the Infection resistance it provides.

Complete “Holder Wants Sample One”

  1. Return to Medical at the Interchange. Use Holder’s keycard to open the door to the lower level.
  2. Use the nearby decontamination control to clear the poisonous gas, restore systems power, and release the lockdown.
  3. Search the operating theatre area for the Sample One canister.
  4. Return the canister to Holder.

Infection hazards make the lower level dangerous. Move through it quickly or use Strange Tonic to help manage the risk.

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#1 Best Overall
Atomfall - PlayStation 5
  • Player Driven Mystery: Unravel a tapestry of interwoven narratives through exploration, conversation, investigation, and combat, where every choice you make has consequences.
  • Explore this Green and Unpleasant Land: The picturesque British countryside, with rolling green hills, lush valleys, and rural villages belie the dangers that await you.
  • Search, Scavage, Survive: You’ll need to scavenge for supplies, craft weapons and items, and fight desperately to make it our alive!
  • “Basic Supply Bundle” - Supplies are scarce in the quarantine zone. Improve your chances for survival with additional items to find, including an exclusive melee weapon to help you in those brutal close-quarters engagements. o Exclusive Melee Weapon Variant o Additional Loot Caches o Item Recipe

Continue Holder’s ending route

Delivering Sample One is the initial objective; the poisoned-sample sequence is later ending progression. As Holder’s route advances, obtain Poisoned Sample One, then take it to Oberon’s dig site:

  1. Activate both fire safety valves.
  2. Put Poisoned Sample One into the fluid intake.
  3. Pull the fire safety system lever.
  4. Return to Medical through the Slatten Dale Interchange entrance and leave with Holder.

Spoiler warning: the choice involving Garrow

If you have freed Garrow, telling Holder where she is leads to him killing her. Speak with Holder afterward to get Poisoned Sample One and continue his ending route. If you do not want that outcome, do not reveal her location.

Rank #2
Scars Above, 1 PS5-Blu-Ray-Disc
  • Tauche in ein ausgeklügeltes Abenteuer ein, das von Klassikern der Science-Fiction inspiriert wurde
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Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Support on Ko-Fi

Route and save-file caveat

Atomfall’s choices can affect how objectives play out, and this is one route rather than a guarantee for every save. The available walkthrough information does not establish every possible quest conflict or fail state, so your progression may differ if you have made other consequential choices.

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