Neverwinter Nights 2 updated impressions

The major addition to the single-player game is, however, the new party system. As you play, you’ll bump across other adventurers on the road, in taverns, and so on. With a little persuasion, you can then get them to join you in your quest, and your party can grow as large as four members. What’s more (unlike the original) you can directly control any member of the party at any time, while also being able to pause the game and give general orders to members you aren’t directly controlling. Interestingly, Obsidian has also incorporated an influence system, in which your actions dictate your ability to get your party members to do what you'd like them to do.

Another addition is the dialog system, which offers a more natural and cinematic presentation. Granted, conversations still function almost exactly the same, but everything looks (and sounds) much more exciting while it happens.