From Press Release:
OXFORD (Sept. 16, 2025) – Rebellion, one of the world’s most successful independent video game developers and publishers, has today announced The Red Strain, a new story expansion to its smash hit survival action game Atomfall®. The latest expansion adds a new in-game location called Test Site Moriah, new characters, as well as additional leads, weapons, skills, items and new endings for Atomfall’s main story.
A new trailer revealing the deadly threat posed by the Red Strain is available to watch here: https://youtu.be/quZYMM2cDBw
The Red Strain
Nestled in the hills, away from the prying eyes of the locals, lies Test Site Moriah. A secret research site built by B.A.R.D 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. Now, the facility has fallen into more nefarious hands, and a deadly virus is seeping out from the secret network of underground labs and bunkers. But a route back into the facility has been located, and with it the opportunity to finally get some answers.
- Investigate Test Site Moriah to uncover the mysteries hidden within the top-secret research facility, hidden away for years.
- Find new items and upgrade unique abilities that can be used throughout the Quarantine Zone.
- Enhance your arsenal with new suppressed weapons and take over robot weaponry when you need some extra firepower.
- Fight for survival against fearsome new foes, with some made more powerful by the Red Strain and others the result of twisted experimentation.
Atomfall’s The Red Strain will launch on Sept. 16 on Xbox Series X|S, Xbox One, Windows PC, PC via Steam and the Epic Games Store, PlayStation 5 and PlayStation 4 for $19.99.
To celebrate the release of Atomfall: The Red Strain, new merchandise has dropped on the Rebellion Shop designed for both comfort and post-apocalyptic adventure. This includes an office-friendly enamel mug with the bold C.O.R.E logo, as well as ‘End Of the Line’ drinkware, and a range of t-shirts featuring robots, blueprints and brain jars. Find the full Atomfall product collection on the Rebellion Shop (https://shop.rebellion.com/
Atomfall
A UK-based post-apocalyptic survival-action game, Atomfall is inspired by the real life Windscale nuclear incident in the 1950s. Players will embark on a fictionalized adventure meeting a cast of weird and wonderful characters as they try to uncover the mystery of what happened at the Atom Plant and escape the Quarantine Zone. So far, over 2.5 million players have jumped into the world of Atomfall.
Atomfall is available now on Game Pass, Xbox Series X|S, Xbox One, Windows PC, PC via Steam and the Epic Games Store, PlayStation 5 and PlayStation 4. Atomfall is Verified on Steam Deck.
For the latest news and updates, please visit Atomfall.com and be sure to follow Atomfall on our new social channels: Twitter, Facebook, Instagram and YouTube.
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