As of my knowledge cutoff in September 2021, there is no game called “Aliens: Dark Descent,” and thus it is not available on any gaming platforms or subscription services such as Game Pass.
However, if a game with that title were to be released in the future and made available on Xbox Game Pass, it would mean that subscribers to Xbox Game Pass would have access to the game as part of their subscription. Xbox Game Pass is a subscription service offered by Microsoft that provides access to a library of games for a monthly fee. The service includes a wide variety of games from different genres and publishers, allowing subscribers to play them on Xbox consoles, PCs, or through cloud gaming on compatible devices.
If “Aliens: Dark Descent” were to be released and added to Xbox Game Pass, subscribers would be able to download and play the game as long as it remains available on the service. It’s important to note that specific titles and availability on Xbox Game Pass can change over time, so it’s always best to check the official Xbox Game Pass website or app for the most up-to-date information on available games.