If you’re planning to be in an area with no online coverage, such as
on a long-distance flight or a sailing excursion, you can prepare your
Windows 10 device to allow you to play offline. Most games available in
the Store on your Windows 10 device support offline play, but check the
details of the game to make sure yours is supported by searching for
your game at http://www.xbox.com.
Most games with a campaign mode will be playable offline, but games
with network co-op or multiplayer features will not work while you’re
offline.
While playing offline, some features, such as the ability to
purchase additional items from the Windows Store, will not be
available. Additionally, any leaderboards will be unavailable while
you're offline.
Achievements
If you earn any achievements while playing offline, they will sync
to your account the next time you sign in to Xbox Live on your device.
You won’t see a toast notification letting you know that you unlocked
the achievement until you sign in to Xbox Live on that device.
Cloud saves and offline game play
Before you go offline, connect to Xbox Live to sync your most recent
game save to the cloud. While you play offline, your game save progress
will continue to be saved locally, and it’ll sync the next time you
sign in to Xbox Live. If you want to continue playing on a different
device (or platform, if the game supports Xbox Play Anywhere), you’ll need to go online and
connect to Xbox Live to allow your local saved game to sync with the
cloud again.
If you’re on a Windows 10 device, your cloud saves will
automatically start uploading once you’re signed in and connected to
Xbox Live. Game save sync is usually fast, but allow a couple of
minutes before you try playing on another device.