>>11686401not necessarily
openmw is just a reimplementation of the original morrowind engine that supports all of its packages
it's basically just a free, better version of morrowind's engine therefore you need to have the original morrowind package plus any potential mods for it to work
It's certainly better to use this instead of the original game bc you get a better support on modern hardware and you don't have to deal with severe bugs that bethesda didn't fix for the past 15 years and it also works on ganoo slash linox