Heroes gain experience and abilities through combat in Warcraft III: Reign of Chaos, fighting alongside the distinct units of the Human Alliance, Orcish Horde, Night Elves and Undead Scourge. Each faction also has its own structures.
The single-player campaign moves sequentially through four faction-specific chapters as the Burning Legion prepares to attack Azeroth. Its intertwined stories follow Prince Arthas investigating a plague that turns people into undead, Thrall leading the Orcs toward a new home, and Tyrande defending Night Elf lands. Beyond the campaign, multiplayer includes ranked matchmaking through Battle.net, while the World Editor lets players create custom maps and scenarios.
