one of the Protoss in-game tracks. Tracy W. Bush provided additional support in composing. The musical score of the game was received well by reviewers, who have described it as "appropriately melodic and dark" and "impressive", with one reviewer noting that some of the music owed much of its inspiration to Jerry Goldsmith's score for the film Alien. The first official game soundtrack, StarCraft: Game Music Vol. 1, was released in 2000, comprising tracks from both StarCraft and Brood War, as well as a sizable portion of remix tracks and music inspired by StarCraft, created by several South Korean disc jockeys. The soundtrack was distributed by Net Vision Entertainment. In September 2008, Blizzard Entertainment announced that a second soundtrack, StarCraft Original Soundtrack, had been released on iTunes. This soundtrack consisted entirely of the original music from StarCraft and Brood War, both from in-game themes to music used in the cinematic cutscenes. Expansions and versions Computer expansions Before the release of StarCraft, Blizzard Entertainment released a free-to-download game demo entitled Loomings, comprising three missions and a tutorial. The prequel was made available for the full game in October 1999 as a custom map campaign, adding two extra missions and hosting it on Battle.net. In addition, the full release of StarCraft included a secondary campaign entitled Enslavers. Consisting of five missions played as both the Terrans and the Protoss, Enslavers is set in the second campaign in StarCraft and follows the story of a Terran smuggler who manages to take control of a Zerg cerebrate and is pursued by both the Protoss and Terran Dominion. Enslavers acts as an exemplar single-player campaign for the game's level editor, highlighting how to use the features of the program. StarCrafts first expansion, Insurrection, was released for Windows on July 31, 1998. The expansion was developed by Aztech New Media and authorized by Blizzard Entertainment. Its story focused on a separate Confederate colony alluded to in the manual to StarCraft, following a group of Terran colonists and a Protoss fleet in their fight against the Zerg and a rising local insurgency. Insurrection was not received well, being criticized by reviewers for lacking the quality of the original game. Insurrection was followed within a few months by a second expansion, Retribution. Developed by Stardock, published by WizardWorks and authorized by Blizzard Entertainment, Retribution follows all three races attempting to seize control of a powerful crystal on a