Neverwinter Nights (NWN), produced by BioWare and published by Infogrames (now Atari), is a third-person perspective computer role-playing game that is based on third edition Dungeons & Dragons and Forgotten Realms rules. It was originally to be published by Interplay Entertainment, but the publisher's financial difficulties forced the change. Infogrames released Neverwinter Nights for Windows on June 18, 2002. BioWare released the freely downloadable Linux Client in June 2003 (purchase of game still required). MacSoft released a Mac OS X port in August 2003. Two expansion packs were released in mid and late 2003, and a third in 2005. On October 31, 2006, the sequel Neverwinter Nights 2 was released followed by its first expansion in late 2007 and its second one at the end of 2008. The game was based on the concept of building an internet-like model for a massively multiplayer game, allowing the end users to host the server. The belief was this model would create a potentially infinite massively multiplayer game framework. The game was named after the original Neverwinter Nights online game, the first graphical MMORPG, which ran from 1991 to 1997 on AOL. The core release includes the game engine, a campaign that can be played as single player or multiplayer, and the Aurora toolset (for Windows only) used for creating custom content based on the same engine.
Neverwinter Nights: Hordes of the Underdark is an expansion pack for Neverwinter Nights produced by BioWare and published by Infogrames Entertainment (now Atari). The followup to the Shadows of Undrentide expansion, Hordes of the Underdark introduces a new campaign, six new prestige classes: Champion of Torm, Dwarven Defender, Pale Master, Red Dragon Disciple, Shifter, and Weapon Master; and other new features such as the ability to hire two henchman at once and the increase of the maximum attainable character level from 20 to 40. The Windows version also includes new scripting options for the Aurora toolkit.
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 five prestige classes: Arcane Archer, Assassin, Blackguard, Harper Scout, and Shadowdancer; new 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.