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 is the official
expansion pack to
Warcraft III: Reign of Chaos,
requiring Reign of Chaos to play. Released in stores worldwide in multiple languages beginning on July 1, 2003,
it includes new units for each race, two new
auxiliary races, four campaigns, five neutral heroes,
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 has released
patches for the game to fix
bugs, add new features, and balance
multiplayer.