Activision Blizzard will triple the amount of Guitar Hero titles and content it offers by 2010, Activision Publishing CEO Mike Griffith revealed today at the company's Analyst Day.

That expansion extends to both retail titles and downloadable content for the popular multi-instrument music game series, and follows Activision's plans to double the amount of Guitar Hero releases in 2009.

The growth will be accomplished by bringing in more developers and more hardware suppliers, Griffith explained. Late last week, the company purchased UK developer FreeStyleGames, which is currently working on "localized downloadable content" for the Guitar Hero brand.

The next Guitar Hero game, officially dubbed World Tour but often referred to as Guitar Hero 4, hits PlayStation 2, PlayStation 3, Xbox 360 and Wii on October 26.

Activision Blizzard subsidiary Activision Publishing announced today that it has purchased FreeStyleGames, a UK-based developer best known for its breakdancing game B-Boy (PS2, PSP).

FreeStyleGames is currently working on "localized downloadable content" for the Activision-owned Guitar Hero franchise, along with a new music-based game. According to Activision, the acquisition represents the latest step in "its global leadership position in the music-based genre." Financial details were not specified.

Over on its official site, FreeStyleGames affirmed that it will "retain creative control, continue to run the studio and have the opportunity to continue to achieve our own ambitious targets."

"We can begin to leverage Activision's experience, infrastructure and support to deliver on the games we have in development," the developer added.