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.