Though not perfect, 0 can be summarized as "portable PSO." It has very similar mechanics, but with some improvements to combat, the most notable being a dedicated dodge button. I absolutely love this game. Played some 200h of it (if not more) across two saves. I started out with a ROM running out of a flash cart and later on bought a legit CIB copy, where I started a fresh save. I have very fond memories of this game and would love for others to experience it as well. Bringing it to PC would be an opportunity to revive the online community, something that's currently a bit of a hassle with a DS or 3DS (not to mention there's no community to speak of).