Doom is just the shareware version, just like most of the others (some already called with that fancy modern name "demo"). Some are freeware, some have been released into public domain after they went out of sale.
If you check it out, don't forget to have a look atthe somewhat hidden 3D mode. Though well made, the 2D mode is just a Google-Maps-like view, and the 3D mode is entirely different.
I don't think it's the passport thing. The differences between European passports are minor, so in that matter you surely could accept all EU nationalities. If you really want the best ones, then Sweden, Finland, France, Italy, Austria and Switzerland are among the ones that bring you the farthest in the world, and those are not in the list, while Greece and Norway are less powerful passports, and the USA, Canada and Australia even less, and all of them are in the list.
Not having 60 fps might be an issue for a shooter or anything that is built on fast reactions, but it doesn't really sound like an issue in a city builder.
Nobody (that I know of) shorted, but Riccitiello and several other Unity executives sold shares in the weeks before the announcement. For at least Riccitiello this was part of a longer effort of selling, though, as he sold many shares over the whole past year.
According to Wikipedia, they were arrested 3 years ago, not 5. Of the 9 people arrested, 2 were released after 3 days, the other 7 were charged, but only 1 of them was still kept detained after "a few months", and he was released for health reasons in April (though he still is charged).
Huh? That guide is pretty extensive in providing different options and ways, but it's not complicated at all. The whole thing is about 2500 words, that would be about 5 pages printed. That's probably much shorter than most Windows guides, and they are not typically offering so many options.
Given that in the very same post he wrote "we need to go back, way back, into the mists of time, when dinosaurs roamed the earth, and we started working on TF2", did you consider it could just be a joke?
Microsoft Teams has a completely different technical base than Skype for Business. Other platform, other language, other tech stack, other APIs, other protocols, other features. The one that just was a reskinned something was Skype for Business, formerly known as Lync, formerly known as Office Communicator, formerly known as Windows Messenger, formerly known as Exchange Conferencing, ...
It wants a code for level selection. You get the code for level 2 once you finish level 1, and so on. So just start with level 1 (F1).