Hordes of the Underdark is actually a damn good game by its own right, and Shadows of Undrentide isn't half bad, either. Both are much better than the original campaign. Add on the great mods they allow you to play and they're an excellent value. And as a limited time offer get a free complimentary knife set with your purchase!* Oh, and NWN is quite different in multiplayer. I played on an RP world and it was quite fun, both the roleplaying and the combat, where I actually felt like there was real strategy going on with a team of human-controlled party members (or at least strategy that wasn't based around trying to keep stupid henchmen from getting themselves killed; single-player NWN often feels like a game of Lemmings). *Offer void in everywhere.