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
"" is the official sequel to "StarCraft" released for Windows and Mac OS X by Blizzard Entertainment on July 27, 2010. The game was announced at the Worldwide Invitational in South Korea on May 19, 2007 with a pre-rendered cinematic cut scene trailer and a gameplay demonstration of the Protoss. Further demonstrations regarding the game's new features have been showcased at subsequent Blizzcons and other games conventions. The game incorporates a new 3D graphics engine and adds new features such as the Havok physics engine. "StarCraft II" also incorporates DirectX 10 level effects in Windows. Originally envisioned as a single game, "StarCraft II" was split into three parts during development, one for focusing on each race. The base game, "Wings of Liberty", follows the Terrans, while two expansion packs, "Heart of the Swarm" and "Legacy of the Void" have been released to complement "Wings of Liberty" and further the story from the views of the Zerg and Protoss, respectively. The story of "Wings of Liberty" continues from four years after the conclusion of "Brood War", and revolves around Jim Raynor's struggles against the Terran Dominion.