 Mask of the Betrayer is an expansion pack for Neverwinter Nights 2 and its core gameplay is identical. The game uses the 3.5 edition rules of the tabletop role-playing game Dungeons & Dragons. Players can create a character from scratch and make use of Mask of the Betrayer's new races, classes, and feats, or import an existing character from Neverwinter Nights 2. Characters must be at level 18 to begin the game. The level cap has been raised from 20 to 30, allowing for epic level characters and accompanying prestige classes and feats. Mask of the Betrayer features all of the races from Neverwinter Nights 2, as well as introducing two types of elves (the wild elf and the half-drow), and four types of genasi. It also contains two new base classes, the "favored soul" and "spirit shaman", and five new prestige classes. The game adds more than 100 new feats and magical spells to the base game.
