It takes guts to radically alter a game that has 
12 million paying subscribers—but when the company doing the tinkering is Blizzard Entertainment, you generally won’t hear a lot of complaints.
“World of Warcraft: Cataclysm” hits store shelves Tuesday and, as you might guess by the name, it will turn the world of Azeroth on its ear. At the same time, it could make the most popular online game in the industry’s history even bigger—and prove to be a significant revenue boost for Activision-Blizzard.
Chris Morris: Journalist 