Obsidian clearly rides on the original Neverwinter Nights's success, with little else.

User Rating: 4.3 | Neverwinter Nights 2 (CD-ROM) PC
My first thoughts when I heard about the Neverwinter Nights project were ones of intrigue and excitement. Neverwinter Nights, the first, had been a very well made game, one that created an unprecedented representation of the Dungeons and Dragons role-playing game. It expanded upon the concept of personal gameplay in computer RPGs, allowing you to create many varieties of character and play out almost any medieval-fantasy scenario you could conceive of.
Neverwinter Nights 2 has taken these premises and bogged them down with clunky new systems, both in terms of the gameplay and the toolset. Whereas Neverwinter Nights the first had an easy to use, intuitive system, the sequel takes some figuring out.
Unfortunately, the creativity of Obsidian's employees proves to be lacking, since most of the sound effects and concepts seem to be taken directly from the older game.