World Of Warcraft
World of Warcraft, often abbreviated as WoW, is a massively multiplayer online role-playing game (MMORPG) by Blizzard Entertainment, a subsidiary of Activision Blizzard. World of Warcraft requires a subscription fee to be paid to allow continued play, with options to pay in one month, three month or six month blocks, although timecards of varying length are available both online and from traditional retailers. Expansion packs are also available online, and are also available from traditional retailers. As the game client is the same regardless of the version of World of Warcraft the user owns, the option to purchase the expansion online was added as it allowed for a quick upgrade.
With 11.4 million subscribers as of March 2011, World of Warcraft is currently the world's most-subscribed MMORPG, and holds the Guinness World Record for the most popular MMORPG by subscribers. In April 2008, World of Warcraft was estimated to hold 62 percent of the MMORPG subscription market.
