Being 'Massively Multiplayer,' World of Warcraft allows thousands of players to interact within the same world. Players assume the roles of Warcraft heroes as they explore, adventure, and quest across a vast world. World of Warcraft is an online role-playing experience set in the award-winning Warcraft universe. As the battle-worn races begin to rebuild their shattered kingdoms, new threats, both ancient and ominous, arise to plague the world once again. Four years have passed since the aftermath of Warcraft III: Reign of Chaos, and a great tension now smolders throughout the ravaged world of Azeroth.