Warcraft
In 2004, Blizzard Entertainment moved the series away from the real-time strategy genre and released "World of Warcraft", a massively multiplayer online role-playing game (MMORPG). Requiring a subscription fee to be paid to play, it also introduced regular additional content to the series in the form of patches. "World of Warcraft" gained popularity worldwide, becoming the world's largest subscription-based MMORPG in 2008. The game reached a peak 12 million subscribers worldwide in October 2010. "World of Warcraft" has had seven expansions as of 2018. During the production of "", Blizzard co-founder Frank Pearce stated that "If there's a team that's passionate about doing another "Warcraft" [real-time strategy], then that's definitely something we would consider. It's nothing that we're working on right now, we have development teams working on "", "", "Diablo III", and when those teams are all off the projects they're working on, they'll be intimately involved in the discussions about what's next".
World of Warcraft
On October 7, 2010 "World of Warcraft" reached a subscriber base of over 12 million players. Since May 2011, the number of players playing had decreased by 10% from 11.4 million to 10.3 million. Blizzard's CEO Mike Morhaime said that the reason was probably due to a drop-off in the Eastern markets. In 2012, senior producer John Lagrave told Eurogamer that the drop in subscriptions may have also been attributed to the recent release of BioWare's "".