 Both RedOctane and Harmonix experienced changes in 2006 . RedOctane was bought by Activision in June — who spent US $ 100 million to acquire the Guitar Hero franchise — while it was announced in October that Harmonix would be purchased by MTV Networks . As a result of the two purchases , Harmonix would no longer develop future games in the Guitar Hero series . Instead , that responsibility would go to Neversoft , a subsidiary of Activision known for developing the Tony Hawk 's series of skateboarding games . Neversoft was chosen to helm the Guitar Hero series after Neversoft founder , Joel Jewett , admitted to the RedOctane founders , Kai and Charles Huang , that his development team for Tony Hawk 's Project 8 went to work on weekends just to play Guitar Hero . Activision CEO Bobby Kotick believed that Neversoft would help them bring great games to the series , but on reflection , stated that had Activision explored Harmonix further as a continued developer for the series , things " may have turned out differently " . In addition , Activision began seeking other markets for the game ; a Nintendo DS version of the series was developed by Vicarious Visions , while a Guitar Hero Mobile series was created for mobile phones . The company also began considering the expansion of the series to band @-@ specific titles with Guitar Hero : Aerosmith . Later , in November 2008 , Activision acquired Budcat Creations , another development studio that had helped with the PlayStation 2 versions of Guitar Hero III and World Tour , announcing that they would be helping to develop another game in the Guitar Hero series . 
 Both RedOctane and Harmonix experienced changes in 2006 . RedOctane was bought by Activision in June — <a href='null_relcl' title='1'><mark>who</mark></a>spent US $ 100 million to acquire the Guitar Hero franchise — while it was announced in October that Harmonix would be purchased by MTV Networks . As a result of the two purchases , Harmonix would no longer develop future games in the Guitar Hero series . Instead , that responsibility would go to Neversoft , a subsidiary of Activision known for developing the Tony Hawk <a href='null_genetive' title='2'><mark>'s</mark></a>series of skateboarding games . Neversoft was chosen to helm the Guitar Hero series after Neversoft founder , Joel Jewett , admitted to the RedOctane founders , Kai and Charles Huang , that his development team for Tony Hawk <a href='null_genetive' title='3'><mark>'s</mark></a>Project 8 went to work on weekends just to play Guitar Hero . Activision CEO Bobby Kotick believed that Neversoft would help them bring great games to the series , but on reflection , stated that <a href='been_done' title='4'><mark>had</mark></a> Activision explored Harmonix further as a continued developer for the series , things " may <a href='been_done' title='5'><mark>have</mark></a> turned out differently " . In addition , Activision began seeking other markets for the game ; a Nintendo DS version of the series was developed by Vicarious Visions , while a Guitar Hero Mobile series was created for mobile phones . The company also<a href='been_done' title='6'><mark></mark></a> began considering the expansion of the series to band @-@ specific titles with Guitar Hero : Aerosmith . Later , in November 2008 , Activision acquired Budcat Creations , another development studio <a href='null_relcl' title='7'><mark>that</mark></a><a href='been_done' title='8'><mark>had</mark></a> helped with the PlayStation 2 versions of Guitar Hero III and World Tour , announcing that they would be helping to develop another game in the Guitar Hero series . 
Both RedOctane and Harmonix experienced changes in 2006 . RedOctane was bought by Activision in June — spent US $ 100 million to acquire the Guitar Hero franchise — while it was announced in October that Harmonix would be purchased by MTV Networks . As a result of da two purchases , Harmonix would no longer develop future games in the Guitar Hero series . Instead , dat responsibility would go to Neversoft , a subsidiary of Activision known fir developing tdaTony Hawk  series of skateboarding games . Neversoft was chosen to helm the Guitar Hero series after Neversoft founder , Joel Jewett , admitted to thdaedOctane founders , Kai and Charles Huang , that his development team fa Tony Hawk  Project 8 went to wrk on weekends just to play Guitar Hero . Activision CEO Bobby Kotick believed that Neversoft would help them bring great games to the series , but on reflection , stated tdatdone Activision explored Harmonix further as a continued developer for thedaries , things " may done turned outt differently " . In addition , Activision began seeking other markets for the dae ; a Nintendo DS version of the sdaes was developed by Vicarious Visions , while a Guitar Hero Mobile series was created for mobile phones . The codany also done began considering the expdaion of the series to band @-@ specific titles with Guitar Hero : Aerosmith . Later , in November 2008 , Activision acquired Budcat Creations , anotha development studio done helped with the PlayStation 2 versions of Guitar Hero III and World Tour , announcing thdathey would b helping to develop aanothagame in the Guitar Hero series .