Warcraft III: The Frozen Throne is a real-time strategy computer game developed for Microsoft Windows, Mac OS and Mac OS X by Blizzard Entertainment; it can be played also on Linux systems by using Wine or Cedega. It is the official expansion pack to Warcraft III: Reign of Chaos, requiring the ownership of Reign of Chaos to play. Released in stores worldwide in multiple languages beginning on July 1, 2003, it includes an additional hero for each race and two to three new units per race, four campaigns, a new neutral race (the Naga), five neutral heroes (an additional neutral hero was added April 2004 and two more were added in August 2004), the ability to build a shop and various other improvements such as the ability to queue upgrades. Sea units were reintroduced; they had been present in Warcraft II but were absent in Reign of Chaos. Blizzard Entertainment regularly releases patches for the game to fix bugs, add new features, and balance multiplayer play.

NOTE: You must have the put "war 3" in the WAR3 folder. Also it doesn't require a CD to play, and you cannot play online. Also, if you have Warcraft III Reign of Chaos, and upgraded to Frozen Throne, you still can play Reign of Chaos.

The game will be focused on groups of noble warriors supporting mighty, Legendary Heroes, each of whom can advance and become more powerful as the game progresses. These Heroes are the central focus of the single-player game. Four linked campaigns - featuring the Humans, Undead, Orcs and Night Elves - together form the story of the day the sky rained fire and war once again swept the battered lands of Azeroth. Players first take the role of Arthas, Paladin and crown prince of Lordaeron, as he investigates an uprising of Orcs and rumors of a plague sweeping the northern end of the kingdom. As the single-player game advances, the story moves on to other races, with each campaign picking up where the previous one left off. Heroes of other races appear throughout the campaigns, many times as allies, yet other times as enemies. "It's very exciting to return to the Warcraft series," stated Mike Morhaime, president and co-founder of Blizzard Entertainment. "We're very proud of what we've accomplished with this game and we look forward to welcoming a new generation of gamers to Blizzard's first PC game world." Warcraft III immerses players in a compelling, dynamic 3D world of incredible depth and detail. Daunting monsters roam a landscape filled with neutral towns, strongholds, and temples, while stunning environmental effects bring the world to life. The game includes a robust campaign editor for creating custom 3D maps and unique missions, with scripts for units, spells, and action-packed events.