World of Warcraft (WoW 2.0.1): The Burning Crusade
World of Warcraft: The Burning Crusade is the first expansion set for the MMORPG World of Warcraft. It was released on January 16, 2007 at local midnight in Europe and North America, selling nearly 2.4 million copies on release day alone and making it, at the time, the fastest-selling PC game released at that point. Approximately 3.53 million copies were sold in the first month of release, including 1.9 million in North America, over 100,000 copies in Australasia, and nearly 1.6 million in Europe.
The expansion's name refers to the return of the "Burning Legion"; a vast army of demons being one of the main, recurring antagonist forces in the Warcraft-universe and whose last invasion was defeated in Warcraft III: Reign of Chaos. This legion and its allies are the main enemy which players will fight against in The Burning Crusade. In addition to some new areas on Azeroth, this expansion mainly features the ravaged world of Outland which the Burning Legion and other powerful beings control.
The Doom Lord Kazzak reopened the Dark Portal to Outland, flooding Azeroth with the ravenous demons of the Burning Legion. Expeditions from the Horde and Alliance, reinforced by their new blood elf and draenei allies, passed through the gateway to stop the invasion at its source. On Outland's desiccated Hellfire Peninsula, the Alliance discovered several of their heroes who had crossed through the portal many years before, while the Horde made contact with the Mag'har (uncorrupted) orcs who had not participated in their race's original invasion of Azeroth. The expedition into Outland dragged Horde and Alliance armies further into conflict with the agents of the Legion and the lieutenants of Illidan Stormrage, who had claimed the shattered realm for his own.
The Black Temple
In his quest to reign over all of Outland, Illidan the Betrayer had established a mighty stronghold for his forces within the Black Temple, a former draenei citadel. Yet his influence began to wane after the defeat of his most trusted lieutenants, including the ruler of the Illidari Naga, Lady Vashj, and the traitorous former leader of the blood elves, Kael'thas Sunstrider. The resulting window of opportunity permitted Akama, an elder sage of devolved draenei known as the Broken, to rebel against the self-styled "Lord of Outland." Along with Illidan's former jailor, the obsessed night elf Maiev Shadowsong, Akama helped a group of heroes infiltrate Illidan's seat of power and put an end to the Betrayer's reign once and for all.
The Gods of Zul'Aman
Following years of battles alongside the old Horde, the troll warlord Zul'jin retired to the city of Zul'Aman, capital of the Amani trolls, where he called upon mysterious dark powers to rebuild his army. While the eyes of Azeroth focused on the fight against the Burning Legion and the expedition to Outland, treasure-seekers invaded Zul'Aman, rekindling Zul'jin's hatred of the outside world—particularly the high elves of Quel'Thalas. Upon hearing that these newly christened "blood elves" had become part of the Horde in his absence, the infuriated Zul'jin declared war on both Horde and Alliance. To gain the upper hand, Zul'jin attempts to awaken ancient animal gods to harness their power, but is slain by a group of heroes before his plans can come to fruition.
Fury of the Sunwell
Fresh from his defeat in Outland, Kael'thas Sunstrider returned to the blood elf city of Silvermoon. Rather than lead his people to glory as he had promised, the disgraced prince betrayed them. Kael'thas plotted to use the legendary Sunwell, source of the blood elves' magical power, to summon the demon lord Kil'jaeden into Azeroth. Aided by a joint task force of blood elves and draenei, the Shattered Sun Offensive, Horde and Alliance heroes, with the help of a dragon Kalecgos and the Sunwell's mortal form, Anveena; narrowly stopped both Kael'thas and Kil'jaeden, though Anveena sacrifices herself in the process. The draenei prophet Velen then uses the naaru M'uru's energy to reignite and purify the Sunwell.