Warcraft III: Reign of Chaos is a real-time strategy game developed by Blizzard Entertainment and released in 2002. It is set in the fantasy world of Azeroth and features four playable factions: Humans, Orcs, Night Elves, and the Undead. Players gather resources, build bases, and command armies to complete various missions and objectives. The game introduces a unique hero system, allowing players to control powerful units with special abilities. Reign of Chaos also includes a rich storyline, with campaigns for each faction that explore their conflicts and alliances. The game was praised for its graphics, gameplay, and engaging narrative.