Guitar Hero
In April 2015, Activision announced a new entry in the series, titled "Guitar Hero Live". The title was developed by Activision's internal studio FreeStyleGames, who previously had worked on the "DJ Hero" spinoff titles. FreeStyleGames were given free rein to reboot the "Guitar Hero" series for next-generation consoles. One of their first innovations was to drop the standard five-button guitar controller, ultimately designing a six-button guitar controller, with two rows of three buttons each, allowing them to mimic actual guitar fingering. "Guitar Hero Live" was released with both a career and an online mode. The career mode used full-motion video taken from the perspective of a lead guitarist underneath the note highway, to create an immersive experience to the player. The online mode, called "GHTV", discarded the previous downloadable content approach and used a music video channel approach to stream playable songs to players, adding new songs to the catalog on a weekly basis. The game was released in October 2015.
Guitar Hero
The series currently has ten major releases (seven "Guitar Hero" games, two "DJ Hero" games and "Band Hero") and five expansions on gaming consoles. There are spin-offs for Windows and Macintosh systems, mobile phones, the Nintendo DS (the "" series), and an arcade game. The "Guitar Hero" franchise was a primary brand during the emergence of the popularity of rhythm games as a cultural phenomenon in North America. Such games have been utilized as a learning and development tool for medical purposes. The first game in the series was considered by several journalists to be one of the most influential video games of the first decade of the 21st century. The series has sold more than 25 million units worldwide, earning US$2 billion at retail, claimed by Activision to be the 3rd largest game franchise after the "Mario" and "Madden NFL" franchises; the third main title of the series, "Guitar Hero III: Legends of Rock" is also claimed by Activision to be the first single video game title to exceed $1 billion in sales.