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 World Tour
The fourth major entry to the "Guitar Hero" series, at the time named "Guitar Hero IV", was officially announced upon the merger of Activision and Vivendi Games in December 2007. "We couldn't have done it without Red Octane's support." says the Guitar Hero Team. The game's new name, "Guitar Hero World Tour", was officially announced by Activision in May 2008.