sentences:  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 "".