Warcraft III Frozen Throne 

Warcraft III: The Frozen Throne adds a host of new features to the game, including four new campaigns that take you across the frozen continent of Northrend. Explore new maps and master new units such as the Troll Bat Riders, the Blood Elf Spell Breakers, and the destructive Mountain Giants. Lead your forces into battle with powerful Hero units. Hardened by experience, Heroes can advance in level, learn spells, carry special items, and confer special benefits to nearby units.