The original scenario supplied with the Neverwinter Nights game engine is known as the official campaign. It comprises approximately sixty hours of gameplay. The gameplay centers on the development of a player character (PC) through adventuring, who ultimately becomes the hero of the story. The PC is tasked with defeating a powerful cult, collecting four reagents required to stop a plague, and finally thwarting an attack on the city of Neverwinter, located along the Sword Coast of Faerûn, in the Forgotten Realms campaign setting of Dungeons & Dragons. The first and final chapters of the official campaign deal with the city of Neverwinter itself, but the lengthy mid-story requires the player to venture into the surrounding countryside and travel northward to the city of Luskan. Along the way, many optional side quests are made available.