World of Warcraft is an online role-playing game.
Massively multiplayer online role-playing games ( MMORPGs ) are a combination of role-playing video games and massively multiplayer online games in which a very large number of players interact with one another within a virtual world . World of Warcraft . With a peak of 12 million subscriptions in October 2010 and Blizzard 's final report of 5.5 million subscriptions in October 2015 , World of Warcraft remains the world 's most-subscribed MMORPG , and holds the Guinness World Record for the most popular MMORPG by subscribers .