Neverwinter Nights: Hordes of the Underdark is an expansion pack for the role-playing video game Neverwinter Nights produced by BioWare and published by Atari. The follow-up to the Shadows of Undrentide expansion, Hordes of the Underdark adds a campaign, prestige classes, and other features. The Windows version also includes new scripting options for the Aurora toolkit. Gameplay Hordes of the Underdark includes six new prestige classes: Pale Master, Shifter, Weapon Master, Champion of Torm, Red Dragon Disciple, and Dwarven Defender. The game also adds the ability to hire two henchman at once and increases the maximum attainable character level to 40. Plot Hordes of the Underdark continues the story of Shadows of Undrentide. While in the plane of shadows, the player character finds an artifact called the Relic of the Reaper, that transports them to the Realm of the Reaper if they are mortally wounded, preventing them from actually dying. The player character escapes the plane of shadows, and stays for a while in Waterdeep. Soon, it is discovered that the drow, residents of the Underdark, are using the Undermountain under Waterdeep in an attempt to invade the surface world. Since the Undermountain is supposed to belong to the wizard Halaster, who hates the drow, an ex-adventurer named Durnan asks the player character to investigate. With the help of a good drow named Nathyrra, the player character finds Halaster imprisoned by the drow. Upon being freed, Halaster informs the player character that the drow queen, the Valsharess, wishes to rule both the Underdark and the surface. He then asks the player character to kill the Valsharess, placing a geas on the player and his allies to ensure that they obey. The player character is then taken to the city of Lith My'athar, populated by good drow, where the player is given more information. The player character is told that the Valsharess has made alliances with various races of the Underdark, and has somehow enslaved the archdevil Mephistopheles. After forming alliance with other nearby races of the Underdark, the player is approached by the Valsharess in a dream in order to turn the player to her cause. Afterwards, she attacks Lith My’athar, and with help from the player character, they either are able to push her armies back to her lair, or the good drow of Lith My'athar are slaughtered. The player character is then captured by Mephistopheles and placed in