My game (for honor) is gone!

Did you actually purchase the game, or was the game "bought" as a free Game with Gold or rented during Game Pass?

If it was a Games with Gold game, you will have to have an active Gold membership, and as a Game Pass game it might have left Game Pass or you cancelled the Game Pass subscription.

Did you purchase this game from the store or was this on the game pass?

Call Xbox live. They can look up your purchase history or you can look in your own history. I know on the xbox360 it is under the account menu, I am not sure where it is on the Xbox One. Hope it helps.

Are you logged in with the account that owns the game? Did you buy it already or take it when it came out in live gold?

Hello Mickey016

Game-

You should still be able to play the game, Have you tried Power Cycling and Uninstalling and Re-Installing?

Progress-

The best thing to do is contact Ubisoft Support and they should be able to look in to it since the game is all server side on there end

https://support.ubi.com/en-GB