KOTOR is a straightforward fairy tale story in the style of the original trilogy. There's a chosen one, he takes the standard monomythic hero path for the second time in his life and defeats the antagonist. I love KOTOR, but the plot here is pretty simple and uncomplicated, not that it raises any themes. But KOTOR 2, on the other hand, is a pretty mature story with philosophical reflections on the nature of conflict, culture, etc.
Jade Empire is also quite simple, but that's more due to the chosen setting. The Eastern school of philosophy puts the content above the form, so it looks very superficial.
I agree with Origins, no complaints here, strong near-medieval setting and multidimensional plot.