I've never actually went out and looked for it to be called that, I'm just surmising based on what little I gleaned when it came out and the fact that I never see it under RPG when perusing the genre on platforms. I guess it's just my exposure. But I guess that's beside the point. The real matter seems to be that ARPG games tend to straddle the line in a lot of people's eyes for some reason. And some people think the third person action variety are just action (possibly action-adventure games), while overhead versions (which tend to be more hack'n'slashy) games like Diablo are the only ARPGs in the minds of certain people. Case and point: Horizon: Zero Dawn is totally an action RPG, but people put the thread in General Gaming, and not General RPGs. In the end it's just splitting hairs, so it doesn't really matter. But it is interesting to see where different people draw different lines on the topic. It's not just Dark Souls and Zelda