 Guitar Hero III Mobile was released for mobile phones in 2007 and 2008 , and was developed by <unk> Northwest LLC . The base version of the game includes 15 songs from both Guitar Hero II and Guitar Hero III , and has released a three @-@ song add @-@ on pack every month since January 2008 . The title has been downloaded by users one million times , with both Verizon and Hands @-@ On Mobile claiming that over 250 @,@ 000 songs are played a day on the platform . The two companies produced two other mobile @-@ based Guitar Hero games ; Guitar Hero III : <unk> Pass , released in July 2008 , adds role @-@ playing elements to manage the band 's success in addition to the core rhythm game , while the mobile version of Guitar Hero World Tour , released in December 2008 , expands each included track for play on both lead guitar and drums , <unk> the expansion of the console series to the full band . 
