The first campaing is long and entertaining, but a little bit "typical" (kill the bad guy, save the world, even if you are evil), but Mask of the Betrayer is probably one of the best and most epic plots I have seen in a rol videogame. Plane traveling, level 20+ characters, epic spells and skills, a curse that can change the entire Forgotten Realms universe... And one of the best features of this videogame is the level of customization. A lot of races, classes and prestige classes makes the variety of characters near-endless.