Custom OS's

So recently I got a new phone and I wanted to try and play Touhou Luna Nights and Star Wars Galactic Battlegrounds and maybe fallout new Vegas on it with the limbo emulator.

So I looked up some OS's to try and found theses.

But then I remember someone recommending to never use a OS that was not from a official developer.

What do you guys think?
Also feel free to post any links for other modded/custom windows Operating Systems if you like.
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