Unfortunately not on PC but the Xenoblade Chronicles games are very MMO-like, in particular Xenoblade Chronicles X which puts less emphasis on the overall story and more on exploration, sidequests, levelling, min-maxing and gameplay systems. You’ll find great worlds to explore and combat that is quite reminiscent of typical cool-down systems in MMOs. XBX does have some online components but you can play the whole game completely offline too.
Unfortunately not on PC but the Xenoblade Chronicles games are very MMO-like, in particular Xenoblade Chronicles X which puts less emphasis on the overall story and more on exploration, sidequests, levelling, min-maxing and gameplay systems. You’ll find great worlds to explore and combat that is quite reminiscent of typical cool-down systems in MMOs. XBX does have some online components but you can play the whole game completely offline too.