This is another game that's had an early access release this week, so Deluxe Edition buyers can play it right now. In this guide though, we're primarily focusing on Atomfall's release date and release times on Xbox Game Pass.
So, ahead of launch, here's everything we know about Atomfall and its Xbox Game Pass release:
Atomfall Xbox Release Date
Atomfall's official release date is March 27th, 2025 for Xbox Series X|S, Xbox One, PC and Xbox Cloud Gaming. The game will be available with Xbox Game Pass Ultimate and PC Game Pass on March 27th as well.Atomfall 'Deluxe Upgrade' Edition (Early Access)
As mentioned, there is a Deluxe version of Atomfall with early access that began earlier this week, both in the form of a standard Deluxe Edition (£74.99 / $79.99) and a Deluxe Upgrade that's specifically targeted at Game Pass members (£18.89 / $22.49). This package also includes an expansion pack that will be released in the future.Here's a look at the Deluxe Upgrade Edition of Atomfall, along with what's included:

This content requires the base game in order to play.
• 3 days Early Access
• “Story Expansion Pack” – (*not available Day 1):
• “Basic Supply Bundle” Pack
• “Enhanced Supply Bundle” Pack
Atomfall Release Times On Xbox Game Pass
Atomfall's official Xbox Game Pass release time is 7am PT / 10am ET / 2pm GMT on March 27th.The team has provided confirmation of this via an infographic on social media:

How To Pre-Install Atomfall On Xbox Game Pass
As we've mentioned elsewhere, Atomfall's preload is now live on Xbox, and all you need to do is head to the Xbox Game Pass app on your console or PC, search for Atomfall, and then hit the "pre-install all" button.You're looking at an install size of around 30GB on console - and surprisingly double that on PC!