Best game I've ever played in my life!
What you must really appreciate in this game is its story and the customizing of your character. It is just fantasic!
The gameplay here is works like D&D where you take turns to attack your opponent. If your initiative is high, you'll have the first attack, then to the second highest and so on.
Bioware focus on the character so much that whatever action you take in-game will determine your character to be either good or evil. The character system here is vast, from a Halfling Fighter to a Barbarian Sorcerer.
The sound is just plain awesome, Bioware really took the voice acting as an important factor, the way the NPCs talk are really realistic unlike some games where their voices are mostly monotonous. The soundtrack is by Jeremy Soule, this makes your gaming experience through NWN even better!
The graphics here are mediocre, the characters are kind of boxy. Other than that, the sceneries are quite good.
All in all, Neverwinter Nights is really NEVERending, even after completing single player, you'll be so addicted that you'll move on to downloading modules made by other players and even playing online with newly met strangers.
For any of you RPG or D&D lovers, this is a game worth buying, you will not regret it, I promise.
My ratings for it is a superb 9.7/10!