With 11 million subscribers, there are more people actively playing World of Warcraft than there are in all but four of the world's largest cities, and more people than there are in either Austria, Switzerland, Israel or Portugal.
Wrath of the Lich King is a paid-for extension to the existing game world which gives players new realms to explore, new in-game activities to perform and allows for characters to become even more powerful wow gold than before with new equipment to be found and made, and more powerful abilities for characters to learn.
While there are those who play for many, many hours at a time in a fundamentally lonely experience, these people are actually very few and far between.