Xbox PC Gamepass only working on some games

Hi Craig C, my name is Adam.

I’m sorry to hear that you’re having trouble downloading Rainbow Six Siege through your PC Gamepass. I recommend downloading the new Xbox app (not the companion app) from the Microsoft Store. Once you have installed the new Xbox app, you should be able to download Rainbow Six Siege through it.

If this doesn’t work, you can try repairing and resetting the Xbox app, Ubisoft Connect, and the Microsoft Store. You can also check for Windows updates and get all available updates from the Microsoft Store.

I hope this helps.
Adam.

gamepass pc has a completely different catalogue of games and ea access is not part of the gamepass pc side yet (ea access is on console only)

in the gamepass pc version there are some xbox one games which are play anywhere titles (not many).

Some of the games on PC are availble on gamepass on Xbox however not all of them such as Age of empires as it requires a mouse and keyboard. Also gamepass for PC is a separate subscription to Gampeass, you would either have to buy another gamepass subscription
or get Gamepass Ultimate which works both on PC and Xbox

Gamepass Share only works on Xbox, there is no way to share PC game pass

The PC gamepass are new, so, they are adding games, but, the PC gamepass have some games that xbox doesn't have.