The first soundtrack was released as part of the Collector's Edition and as a separate iTunes release; the second soundtrack was released initially at BlizzCon 2013 as an exclusive promotional CD, and is currently available at Blizzard's official store. The release of the expansion saw a short-term renewal of interest in "StarCraft II"'s competitive multiplayer scene and brought about the standardization of competition by Blizzard Entertainment through the redesigned StarCraft II World Championship Series, but saw a long-term decline in interest, sponsorship, and viewership. Following the transition of the title to free-to-play two years after the release of "Legacy of the Void", the second and final "StarCraft II" expansion, the game has experienced a resurgence in interest.