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Bit idea : The Witcher 3 written in assembly with 40 billion lines of code so you can run it on an old windows 98 desktop
(hexbear.net)
I don’t wanna any nerds in here explaining why this is impossible I choose to believe it could be done in theory
As a nerd, I gotta say, this is almost definitely possible. Modern games are so incredibly inefficient in ways beyond our understanding, that if you stripped it down to custom assembly brass tacks, I really don't doubt you could run Witcher 3 on Windows 98 (albeit in a lower resolution).
I'm reminded of this guy who coded Minecraft in Unity, but by focusing on optimisations, made it at least 1000x faster at most benchmarks.
I found a YouTube link in your comment. Here are links to the same video on alternative frontends that protect your privacy: