WarCraft III: The Frozen Throne is an expansion pack for WarCraft III: Reign of Chaos

Following in the tradition of previous Blizzard expansion sets, Warcraft III: The Frozen Throne provides gamers with a vast new chapter in the epic Warcraft saga. In the single-player campaign, players revisit the war-torn world of Azeroth. Several months have passed since Archimonde and the Burning Legion were defeated at the battle of Mount Hyjal, yet
a new threat has arisen throughout the land...