Can I play Xbox games on windows 8.1 games

Hi Danny!

Unfortunately, you cannot play Xbox games on Windows 8.1. It requires Windows 10/11, v.22H1 or higher.

Reference:
https://www.xbox.com/en-US/apps/xbox-app-for-pc

I really like to play tri peaks, but as soon as Windows 8.1 update or upgrade, whatever everyone calls it. It is sluggish and sound issues. It worked smoothly and perfect in Windows 8.0, but as soon as 8.1 was installed and even all the driver updates do
nothing to fix the issues this game has. It is a App issue. This app needs a new update fix for Windows 8.1. I tried other games from XBOX like mahjong and others and they run fine in Windows 8.1. It is this App only. Until someone here from XBOX or Microsoft
decides to fix this, then the game is never installed again or played by me. My mother won't even update or upgrade to Windows 8.1, because of this.

I even contacted BestBuy and Toshiba, and they won't do anything, because it is an App issue. So far I see a lot complaining about this App not doing what it should be doing in Windows 8.1, but nothing is being done to fix it. Such a fun game ends up being
no fun, when it is sluggish and no sound.

Can we use the new Xbox game pass with Windows 8.1 or only with Windows 10 ?

Win 10 only but you should be able to run win 10 if your running 8.1

Unfortunately you will not be able to play the games on Windows 8.1

Windows 10 will be required to be able to play the games that is part of the XboxPlayAnywhere library.

It would be like installing some game designed for Windows 3.1 on a Windows 8.1 PC. 360=3.1 and One=8.1 to be clear. MS, as stated by Eggnogga, is working on an emulator or the like that will play (some if not all) 360 games.