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 was released worldwide on July 1, 2003 for Microsoft Windows and Mac OS X.
The Frozen Throne builds upon the story of Reign of Chaos and depicts the events after the main game’s conclusion. 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. Additionally, the expansion contains Act I of a separate Orc campaign that is independent from the main storyline with Blizzard releasing Acts II and III via patch in December 2003, taking in player feedback of Act I when developing these chapters.
The expansion adds new units, buildings and heroes for each faction, two new auxiliary races, five neutral heroes (with three more later added by patches) as well as a number of tweaks to the gameplay and balancing. Sea units were reintroduced which were absent in Reign of Chaos. Battle.net-powered multiplayer was expanded by the addition of clans, automated tournaments and new maps and custom scenarios.
The Frozen Throne also includes an improved version of the World Editor which allows the user to do more custom work with regards to editing skills, providing more functions in the triggers, new units, more global map settings, and new tile-sets to work with.. While Blizzard still does not officially support the World Editor, the Frozen Throne version offers more options and documentary.