This content requires the base game Atomfall on Steam in order to play.

Release Date:
Sep 16, 2025
Developer:
Publisher:
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Downloadable Content

This content requires the base game Atomfall on Steam in order to play.

Buy Atomfall Story Expansion Pack: The Red Strain

 

The Red Strain

About This Content

Continue the adventure of Atomfall with "The Red Strain” Story Expansion Pack, introducing a new location, enemies, quests, characters, items, weapons, and more.

Nestled in the hills, away from the prying eyes of the locals, lies Test Site Moriah. A secret research station built on the site of an old missile testing facility, it has been shrouded in mystery ever since it opened. But something changed when the quarantine came into effect and the facility has fallen into more nefarious hands who are keen to keep its secrets for themselves. Now a route back into the facility has been located, and with it the opportunity to finally get some answers.

Investigate Test Site Moriah

Before the Windscale Disaster, the research site was home to top-secret government projects, so classified that even those at the top of B.A.R.D were unaware of their existence. Now the facility lies forgotten, deliberately sealed away from the rest of the Quarantine Zone. What secrets rest behind the locked doors? Only you can find out.

A new story in its own right, The Red Strain offers original leads that interlink with Atomfall’s core narrative, expanding the story and unlocking new endings to your adventure.

Enhance your Arsenal

Enhance your experience with a variety of new skills and equipment. Strike from the shadows with new suppressed firearms or unlock the ability to equip the heavy weaponry from disabled robots and unleash devastating attacks on your enemies.

Fight for Survival

A terrifying new threat, never encountered before enemies and challenging obstacles await you, offering an immense challenge. You will need to have your wits about you if you are to have any chance of making it out alive.

Mature Content Description

The developers describe the content like this:

Our game contains:

Violence:
The ability to kill characters with fists, melee weapons, throwables, guns and a bow.
Blood splatter on hands and enemies after killing.
Blood trails as environment decoration.
People/monsters impaled on stakes (though not gory).

Alcohol reference but not use or consumption of alcohol:
Visible alcohol bottles used as crafting materials.
There's a pub that can be found in the Village

Implied Nudity:
A "Feral" character with covered genitals. Their torso is showing but there are no nipples.

Potential Suicide Depiction:
An ambiguous scene where the player jumps into a pit, potentially a form of suicide, though not definitively death.

Cultist Rituals:
The presence of the staked people/monsters indicates cultist rituals.

System Requirements

    Minimum:
    • Requires a 64-bit processor and operating system
    • OS: Windows 10 or later
    • Processor: Intel CPU Core i5-9400f or equivalent
    • Graphics: Nvidia 2060, Intel Arc A750, AMD Radeon RX 6600 or equivalent (6GB minimum)
    Recommended:
    • Requires a 64-bit processor and operating system
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