Instead, that responsibility would go to Neversoft, a subsidiary of Activision known for developing the Tony Hawk's series of skateboarding games.[5] 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.[6] 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".[7] 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.