Baldur's Gate II: Throne of Bhaal is the expansion pack for the computer role-playing game Baldur's Gate II: Shadows of Amn, and is the final chapter in the Baldur's Gate series. It adds one large optional bonus area to the Baldur's Gate II game called Watcher's Keep, which is a multi-level dungeon of sorts. It also extends the main plot line to an epic conclusion. There are also several new powerful weapons, a higher level cap, a further refined Infinity Engine (graphics), and new class-related feats and magical skills. A novelization of the game exists, written by Drew Karpyshyn.
War breaks out throughout Tethyr between the agitated Bhaalspawn who turn out to be numerous and fight each other for power. The player must venture through treacherous regions, including the besieged city of Saradush, the Fire Giant-controlled Marching Mountains, and the desert village of Amkethran. Five legendary Bhaalspawn, each so powerful that they are impervious to normal weapons, rise to power and notoriety, forcing the player character to defeat them either for personal glory or for the fate of Tethyr.
With all quests finished and all Bhaalspawn killed, the player must journey to the planar Throne of Bhaal for the great final battle against Amellysan. Ultimately, the player is presented with the choice of ascending the throne of Bhaal and becoming the new God of Murder, or destroying it and returning to peaceful life as a mortal. The Main Character may also ascend the throne of Bhaal and banish Bhaal's evil essence, becoming a deity dedicated to good and righteousness.