I seem to do this a lot - I’ll find a game whose setting I really like, but dislike the ruleset it uses, so I end up converting it over to the ruleset I prefer (usually Cypher System). I’ve learned that to some people, this is blasphemy of the highest order, which is surprising. I still do it, though. 😬
My first “Shadowrun” game was just taking the setting and using D20 Modern for the rules since I didn’t have the actual Shadowrun books (and couldn’t find them for sale either).
Sometimes, after playing actual Shadowrun, I feel like the D20 Modern rules worked better. 🤣
Depends on the edition of Shadowrun :lol
And there is a Shadowrun inspired d20 setting, iirc!