For those unaware of World of Warcraft, it's a highly popular multiplayer online role playing game available for both Microsoft Windows and Apple Mac OS X, it was originally released in 1994 and in June 2011 Blizzard Entertainment revealed that they had over 11 million subscribers. The game currently hold the world record for the world's most subscribed multiplayer online role playing game.
For Blizzard Entertainment the World of Warcraft series is extremely lucrative and generates a billion dollars each year from the World of Warcraft revenues.
In 2004 the third expansion pack went on sale and within 24 hours of release it has been purchased more than 3 million times, it eventually went on to sell over 4.5 million copies, as a result it has become the fastest selling PC game ever.
A press release from Blizzard Entertainment gives the following details about the new expansion pack
New Playable Race
Pandaren: Adventure through Azeroth as World of Warcraft's first neutral race and decide whether to side with the Alliance or the Horde.
New Playable Class
Monk: Unlock the secrets of pandaren martial arts and do battle as a damage dealer, healer, or tank.
Level Cap Increased to 90
Learn potent new spells and abilities while exploring uncharted zones and taking on challenging new content.
Explore the lush Jade Forest, treacherous Kun-Lai Summit, and other exotic areas of Pandaria designed for high-level characters, and uncover the mystery of the Wandering Isle.
Join up with some friends to achieve a common goal, such as mounting a defense against invading monsters, in a flexible new type of PvE challenge.
Dungeon "Challenge" Modes
Master the ultimate five-player time trial to earn prestige rewards in a new dungeon mode that will put your resolve and coordination to the test.
Challenge other players' companion pets with your own collection in a new tactical mini-game, and find out who's king or queen of the pint-sized battlefield.
New Talent System
Customize your character to suit your play style with the newly overhauled and improved talent system.