Before I begin describing Hordes of the Underdark, the latest expansion pack for BioWare’s Neverwinter Nights, I’d like to make confession: Not only have I played just about every Dungeons & Dragons PC game ever made, I’m also a card-carrying role-playing nerd in the non-computerized, dice rolling, character sheet scribbling sense. When Neverwinter Nights came along, I was impressed. BioWare had created a fully-fledged CRPG that anyone could pick up and play, but didn't skimp on its adherence to D&D's rules. Underdark doesn't just continue the tradition of adding new character classes and options, it sets out to enhance the theme, settings and overall feel of the game in the hope of making it more reminiscent of the tabletop experience.