But there's a lot more to the expansion than just a campaign. Making their first appearance in NWN are a small selection of prestige classes. Prestige classes are specialized, exotic classes that you can't take right from the start due to some rather specific skill, class, race and statistic requirements. Instead, you have to work towards gaining these classes by choosing a specific class to begin with and picking certain skills to advance when you level up. The classes tend to be worth it though, since they open up a lot of powerful special abilities that you wouldn't have access to with a normal class.