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
"World of Warcraft" received very positive reviews upon release, following a period of high anticipation before launch. Although the game follows a similar model to—and was noted for using many familiar concepts from—the role-playing genre, the new approaches to reducing pauses between game encounters were well liked. A common example was the approach to character death. In some previous MMORPGs, a player would suffer a high penalty for character death; in "World of Warcraft", a player is able to recover and start playing quickly. Combat was another area where "downtime", or pauses between play, was reduced. By allowing all character types to recover from damage taken, players can return to combat quickly. Reviewers felt that these changes in pacing would make the genre more accessible to casual players—those who play for short periods of time— while still having "deep" gameplay that would attract players of all levels of interest. The concept of a "rested bonus", or increasing the rate at which a player's character gains experience, was also welcomed as a way for players to quickly catch up with their friends in progression.