The single-player unfolds from the perspective of two new protagonists-the Night Elf warden Maiev Shadowsong and the Blood Elf prince Kael'Thas-as well as returning protagonist Arthas Menethil. The Frozen Throne builds upon the story of Reign of Chaos and depicts the events after the main game's conclusion. It was released worldwide on Jfor Microsoft Windows and Mac OS X. Warcraft III: The Frozen Throne is the expansion pack for Warcraft III: Reign of Chaos, a real-time strategy video game by Blizzard Entertainment. It chronicles the combined efforts of the Human Alliance, Orcish Horde, and Night Elves to stop them before they can corrupt the World Tree. Warcraft III is set several years after the events of Warcraft II, and tells the story of the Burning Legion's attempt to conquer the fictional world of Azeroth with the help of an army of the Undead, led by fallen paladin Arthas Menethil. An expansion pack, The Frozen Throne, was released in July 2003. It is the second sequel to Warcraft: Orcs & Humans, after Warcraft II: Tides of Darkness, the third game set in the Warcraft fictional universe, and the first to be rendered in three dimensions. Warcraft III: Reign of Chaos is a high fantasy real-time strategy computer video game developed and published by Blizzard Entertainment released in July 2002.