sentences:  The game had been developed by FreeStyleGames, sometime after the release of "DJ Hero 2", with the main development duties passed to Virtual Fairground, using their platform The Ride, an Adobe Flash-based platform that would let the game be played in a web browser.The game was cancelled in 2011 along with other pending "Guitar Hero" projects.No further downloadable content for either "Guitar Hero" or "DJ Hero" was made after February 2011, though Activision committed to releasing content that was already in development by that time due to fan response; later, in a move described by "Game Informer" as "the final nail in [the series'] coffins", Activision announced it would discontinue all DLC sales for the series without revoking access to tracks already bought as of March 31, 2014.