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: Wrath of the Lich King
World of Warcraft: Wrath of the Lich King is the second expansion set for the massively multiplayer online role-playing game (MMORPG) "World of Warcraft", following "". It launched on November 13, 2008 and sold 2.8 million copies within the first day, making it the fastest selling computer game of all time released at that point. The game added a substantial amount of new content into the game world, including the new continent of Northrend, home of the eponymous Lich King and his undead minions. In order to advance through Northrend, players are required to reach at least level 68 and the level cap for the expansion is 80. The first hero class was introduced, the Death Knight, that starts at level 55.