[badsectoracula]

It wasn't a universal default, some games like Quake and Chasm did not have reversed Y by default while others like Duke3D and SkyNET had reversed Y by default. Though all of them had an option to reverse Y, i can't think of an FPS that did not have the option.

And TBH i'm not sure how much defaults played a role back then, they all pretty much had very weird defaults :-P.

[rux]

I recently came across my first game where not only is the non-inverted Y the default, there's also no way of setting inverted Y as an option! Consequently I can never play Genshin Impact. The lack of a setting is seemingly a long-running issue in forums, as the developers seem to be ignoring requests to implement it.