Game Pass is a service that offers players access to many games. Some are added to the offer on the release day or some time after it. What about the RPG, Atlas Fallen? From this page, you will find out whether the game is available yet or will be added to Game Pass in the future.
Availability in Game Pass
So far, Atlas Fallen has not been added to either Xbox Game Pass or PC Game Pass. There is also no information from the developers about adding the game to Microsoft's subscription. However, there is a chance that, in the future, Atlas Fallen will be included in the PC/Xbox Game Pass offer. All the more so, as another production by Deck13 Interactive studio, The Surge 2, was available there for some time. Additionally, some games from the publisher of Atlas Fallen (i.e. Focus Entertainment) such as A Plague Tale: Requiem or Atomic Heart are in the PC/Xbox Game Pass offer.
Atlas Fallen is also unavailable to subscribers of other subscriptions, e.g. PlayStation Plus Premium. However, it is possible that this will change in the future.