Expansion packs are additional retail boxed content that, as termed, expand upon the original game.

The first expansion pack to Neverwinter Nights 2 (NWN2) is Mask of the Betrayer (MotB), released on Oct 9th, 2007. A second expansion, Storm of Zehir was released in Winter 2008.

The first Neverwinter Nights (NWN) had two expansion packs: Shadows of Undrentide (SoU) and Hordes of the Underdark (HotU), as well as a variety of smaller premium modules.

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