 Guitar Hero World Tour , previously named Guitar Hero IV , is the fourth full game in the series and was released on October 26 , 2008 for PlayStation 2 , PlayStation 3 , Xbox 360 , and Wii . Analysts had expected that future Guitar Hero games in 2008 would include additional instrument peripherals to compete against Rock Band ; Guitar Hero World Tour was confirmed as in development following the announcement of the merger between Activision and Vivendi Games in December 2007 . Activision 's CEO Bobby Kotick announced on April 21 , 2008 that Guitar Hero World Tour will branch out into other instruments including vocals . Guitar Hero World Tour includes drums and vocals , and can be bought packaged with a new drum set controller , a microphone , and the standard guitar controller . A larger number of real @-@ world musicians appear as playable characters , including Jimi Hendrix , Billy Corgan , Hayley Williams , Zakk Wylde , Ted Nugent , Travis Barker , Sting , and Ozzy Osbourne . Guitar Hero World Tour also features custom song creation that can be shared with others . 
 Guitar Hero World Tour , previously named Guitar Hero IV , <a href='drop_aux' title='1'><mark>is</mark></a>the fourth full game in the series and was released on October 26 , 2008 for PlayStation 2 , PlayStation 3 , Xbox 360 , and Wii . Analysts <a href='been_done' title='2'><mark>had</mark></a> expected that future Guitar Hero games in 2008 would include additional instrument peripherals to compete against Rock Band ; Guitar Hero World Tour was confirmed as in development following the announcement of the merger between Activision and Vivendi Games in December 2007 . Activision <a href='null_genetive' title='3'><mark>'s</mark></a>CEO Bobby Kotick announced on April 21 , 2008 that Guitar Hero World Tour will branch out into other instruments including vocals . Guitar Hero World Tour <a href='uninflect' title='4'><mark>includes</mark></a> drums and vocals , and can be bought packaged with a new drum set controller , a microphone , and the standard guitar controller . A larger number of real @-@ world musicians appear as playable characters , including Jimi Hendrix , Billy Corgan , Hayley Williams , Zakk Wylde , Ted Nugent , Travis Barker , Sting , and Ozzy Osbourne . Guitar Hero World Tour also <a href='uninflect' title='5'><mark>features</mark></a> custom song creation <a href='null_relcl' title='6'><mark>that</mark></a>can be shared with others . 
Guitar Hero World Tour , previously named Guitar Hero IV , the fourth full game in da series and was released on October 26 , 2008 fa PlayStation 2 , PlayStation 3 , Xbox 360 , and Wii . Analysts done expected that future Guitar Hero games in 2008 would include additional instrument peripherals to compete against Rock Band ; Guitar Hero World Tour was confirmed as in development following the announcement of the merger between Activision and Vivendi Games in December 2007 . Activision  CEO Bobby Kotick announced on April 21 , 2008 that Guitar Hero World Tour will branch out into other instruments including vocals . Guitar Hero World Tour include drums and vocals , and can b bought packaged wid a new drum set controller , a microphone , and the standard guitar controller . A larger number of real @-@ world musicians appear as playable characters , including Jimi Hendrix , Billy Corgan , erica Williams , Zakk Wylde , Ted Nugent , Travis Barker , Sting , and Ozzy Osbourne . Guitar Hero World Tour also feature custom song creation can bbshared with others .