To be honest, the first couple of hours I spent playing Torment I didn't even realize it was DnD. By the time I got towards the end, I had completely forgotten that it was DnD. Anyways, Torment is actually pretty weak on some Role Playing aspects. For example, it is relatively linear, and does not allow for totally unique character development. Its goodness really comes from the dialogue, which is very well developed. Furthermore, their is a very sizable part of the game you can miss in your first playthrough, such as the Mordon's Dugeon. Very few developers have the heart to put a lot of work into parts of the game that the player may never see, hence why Torment is simply good. Combat was sort of kind of terrible, though.