sentences:  Activision followed suit with the release of "Guitar Hero World Tour" in 2008, which supported multiple instruments.In 2009, Activision tripled its "Guitar Hero" offerings, and in addition to further continuation of the existing main series with "Guitar Hero 5" and expansions, they introduced the titles "Band Hero", geared towards more family-friendly pop music, and "DJ Hero", a game based on turntablism and featuring a number of mixes.With the release of "Guitar Hero 5", Activision considered the series to have moved away from its heavy metal basis into a broader selection of music.