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After the release of the first two add-on packs, Blizzard Entertainment announced the official expansion pack to "StarCraft", entitled "Brood War". Most of the team at Blizzard Entertainment responsible for "StarCraft" returned to work on "Brood War". Development on "Brood War" began shortly after "StarCraft"s release, and Blizzard Entertainment were assisted by members of Saffire, who were contracted for a variety of tasks consisting of programming and design for levels, visuals and audio effects.