Neverwinter Nights: Hordes of the Underdark Expansion Pack - PC Expansion for Neverwinter Nights New 20-hour single-player campaign Epic levels allow characters to advance as far as level 40 New prestige classes, feats, weapons, spells, and voice sets 2 new tilesets and additional content for the Neverwinter Nights Aurora Toolset Expansion for Neverwinter Nights New 20-hour single-player campaign Epic levels allow characters to advance as far as level 40 New prestige classes, feats, weapons, spells, and voice sets 2 new tilesets and additional content for the Neverwinter Nights Aurora Toolset