Amazon Prime is giving out free copies of Doom Eternal (which I didn't have already) but it's for Microsoft Store... which doesn't work on Linux.
Discussion
Wait until gaben do it's thing or use another pc that has windows I don't know by is such a fuss to Linux users.
There's a way to use the claim code from the website, so I was at least able to register it to my account and I do technically have a partition with Windows on it, but if I have to reboot just to play one game, I'm unlikely to do it.
It's was just the disappointment when doing my free game run seeing that Doom Eternal was up for grabs but using a different launcher than all the others.
weird