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".
StarCraft
Blizzard Entertainment began planning "StarCraft" in 1995, with a development team led by Metzen and Phinney. The game debuted at E3 1996, and used a modified "" game engine. "StarCraft" also marked the creation of Blizzard Entertainment's film department; the game introduced high quality cinematics integral to the storyline of the series. Most of the original development team for "StarCraft" returned to work on the game's expansion pack, ""; the game's development began shortly after "StarCraft" was released. In 2001, "" began development under Nihilistic Software. Unlike the previous real-time strategy games in the series, "Ghost" was to be a stealth-action game. After three years of development, work on the game was postponed in 2004. Development of "" began in 2003; the game was announced in May 2007 and was released in July 2010. The "StarCraft II" franchise continued with the "" expansion, which was released in March 2013. The third "StarCraft II" installment, "", released in November 2015.