Neverwinter Nights: Shadows of Undrentide is an expansion pack for Neverwinter Nights developed by Floodgate Entertainment and BioWare, and published by Infogrames Entertainment (now Atari). It was released in June 2003. The expansion pack adds a new campaign and new features including new character classes, creatures, feats, and spells, and other nuances such as allowing the player to access and modify their henchman's inventory. The Windows version also included scripting options for the Aurora toolkit.