The main harm of cultural appropriation (in my opinion) is if the culture being appropriated, or a form of that culture abroad, is changed by the popularity of the appropriation. I don't think any culture identifies with Tolkien-esque medieval fantasy, so Dark Souls is safe.

I'm not too familiar with Jade Empire, but it seems to be a pretty standard western mystification of Chinese culture, and as such it is part of the harmful appropriation of that specific kind. The harm is caused especially to Chinese people living in the west who have their view of their own culture changed, as well as the views of the people around them. Some harm could be caused to Chinese culture in China, if the popular western view bleeds over to there. They seem to be culturally strong enough to avoid it being anything serious though.

It is also important to note that cultural appropriation is not morally simple, that Jade Empire being potentially appropriative is not really a reason to shun the game or especially any of the people who worked on it. In the first place, it is only appropriative because that kind of portrayal is otherwise popular, if it was alone in being a western mystification of china it would likely not be at all harmful. Both the causes and effects of it are beyond individual moral analysis, the real solution is as always to abolish capitalism.