Guitar Hero
In 2015, Activision announced the first new title to the series in 5 years, "Guitar Hero Live", released in October 2015. The title is considered a reboot of the series, with development being performed by FreeStyleGames, who had developed the "DJ Hero" games previously. As of December 1, 2018, Activision disabled the GHTV servers for Guitar Hero Live, reducing playable content from approximately 500 songs to 42 on disc tracks.
Guitar Hero II
RedOctane stated that the Xbox 360 version of "Guitar Hero II" "planned to feature more downloadable content than any other 360 title" utilizing the Xbox Live Marketplace, including many of the songs from the original "Guitar Hero" a week after the release of the game. Four such packs have been released since April 11, 2007. Additionally, two packs featuring new content to the "Guitar Hero" series have also been released, including songs from My Chemical Romance, Protest the Hero, Trivium, and Atreyu. There have also been individual track downloads featuring songs from bands Los Rodríguez, Pleymo, and Soilwork.