Neverwinter Nights: Shadows of Undrentide is an expansion pack that enhances the original game by introducing a wealth of new content for role-playing enthusiasts. It includes new skills like Tumble and Appraise, along with new feats such as Divine Might and Bullheaded. Players can also utilize new weapons, including Holy Water Flasks and Choking Powder, while exploring the D&D universe with new monsters like Medusa and Female Fire Giant. This expansion not only broadens gameplay but also deepens the overall experience with dozens of new spells and prestige classes, such as Harper Scout.

In addition to the gameplay enhancements, Shadows of Undrentide provides aspiring module makers with expanded tools through the Neverwinter Nights Aurora Toolset. This includes new tile sets for creating diverse environments and automated guides to assist in building custom adventures. With these features, players can craft their own unique quests and storylines, making the game even more immersive and personalized.