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 (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. Warcraft III: The Frozen Throne is the official expansion pack to Warcraft III: Reign of Chaos, requiring Reign of Chaos to play. The official expansion pack patch from Blizzard Entertainment
