Doom Eternal won't launch (Error code: 88500000)

Hello @Nigel_2B, I hope everything is going well!

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Troubleshoot gameplay issues on a Windows 10 device | Xbox Support

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So, I just resolved the issue with Doom Eternal in the weirdest way.

I had to "re-install" every Xbox App game after reinstalling the Gaming Services package by navigating to the game's page in the Xbox App. I started with Marvel's Guardians of the Galaxy, and that worked just fine. I then tried Doom Eternal, and launching it after "re-installing" it failed with the same error message as before.

I then launched Marvel's Guardians of the Galaxy again, waited for the Launcher to appear, clicked Play, and when that game started up it also launched Doom Eternal for some reason - both games started simultaneously, with Doom starting a moment after Guardians and appearing on top.

I went through the initial setup, logging in, confirmation prompts in Doom, changed the resolution, and quit out. I then also quit out of Guardians. I tried launching Doom Eternal again from the Xbox App, and it started up just fine. So Doom Eternals appears fixed, and I have no idea why launching Guardians of the Galaxy fixed it, but it did.

I am disappointed and confused with how much trouble I've had with games from the Xbox App, considering that Microsoft controls both the OS and the app, particularly when everyone else - from giants like Steam and Ubisoft to small platforms like GOG and Itch.io - have figured out how to digitally distribute games that just work. I suspect it has a lot to do with the Universal Windows Platform that the Xbox App uses.

Manually launching 360CE actually works, thanks for the help. But of course it's impossible to change Doom eternal's language...

Launch date for Doom Eternal and Dying Light 2...maybe Cyberpunk too haha wishful thinking though

I appreciate your response in such short time. i tried everything you said but non of them worked and I had to perform a clean windows re-install.

the problem was most likely a problem with the Beta version of Xbox app so I won't join the insider program this time.

thanks again!