New information : I talked to the CReative Director of Realmforge (apparingly the direct developers) about this game (I forgot his name, sorry, my name memory is notoriously bad).
He explained to me that this game is rather meant to be an "sneaking game", rather action-focused, with role-playing game elements (you get experience points with which you can "buy" new "abilities", but all in all it was never meant to be an full-fledged RPG, but rather as an "sneaking action game" with RPG elemnts in it. He also said that it kind of reminds of "the newest Deus Ex", in terms of gameplay - for example, there are dialogs, but not any social interaction carried out like in an "real" role-playing game. It does contain social interaction in form of dialogs, but there are no skill checks involved in this, that's how I understood him.
He also outed himself as an huge Ultima games fan, and that if he could be able to do an "real" RPG, it would be … well, my personal impression was that he meant that it would be rather "old school" - oriented.
Ah, yes, another part of the gameplay : He mentioned that the protagonist has "become" a Vampire, and that he meets other Vampires, "in a club". He would fight some, but he can only use close combat weapons for that. And of course, he can use his abilities he can buy for the experience points gained.
We talked a bit about RPGs in general, and my impression was that he is actually a very sensible man.