There's a huge list of games supported -too many for us to reasonably list here- so check out the full list here on the Xbox website alongside details with all 22 countries the service will be supported in, but alongside the obvious Xbox Game Studios titles we can tell you there's also plenty of third party offerings such as Resident Evil 7: Biohazard, The Witcher 3: Wild Hunt, Yakuza 0, Yakuza Kiwami and Yakuza Kiwami 2, Untitled Goose Game and many, many more.
Game Pass Ultimate is tied to an Xbox gamers Xbox Live account which stores all save files for their Xbox One games in the cloud for free to instantly play on their new streaming service.
More games will be added in time, including titles available on EA Play, which Microsoft recently announced would be added to the Xbox Game Pass Ultimate and Xbox Game Pass for PC subscriptions. They have been gifted a 3-month subscription to Xbox Game Pass Ultimate and an Xbox controller.
New members to the service can now join Xbox Game Pass Ultimate today for just $1 for the first month. As of this writing, cloud gaming is available only in Austria, Belgium, Canada, Czechia, Denmark, Finland, France, Germany, Hungary, Ireland, Italy, Korea, Netherlands, Norway, Poland, Portugal, Slovakia, Spain, Sweden, Switzerland, United Kingdom, and United States.
The long list of games that are available on xCloud from tomorrow will unfortunately not include EA's Play titles.
If you've pre-ordered the Galaxy Note 20 / Galaxy Note 20 Ultra or the Galaxy Tab S7 / Galaxy Tab S7+ in select markets then you should be all set to start using Xbox Game Pass Ultimate through the cloud.