StarCraft: Brood War is an expansion pack released in 1998 for StarCraft — an award winning real-time strategy computer game. It was co-developed by Saffire and Blizzard Entertainment.

The expansion pack introduced new campaigns and two additional units for each race, new tech advancements, new map tilesets, and new music. The campaigns continue the story from where the original StarCraft left off: the Overmind had been destroyed with the sacrifice of Tassadar, the Protoss homeworld of Aiur had been left desolate and rampaged by the Zerg, and Kerrigan was now left alone in her new Zerg form. Full details are in the Brood War introduction.

The first of the new campaigns involves the Protoss, (or rather, the Dark Templars), and mostly takes place on their homeworld of Shakuras. The second campaign features the newly arrived armies of the United Earth Directorate (UED) commanded by Admiral DuGalle, and the last campaign (Zerg) has Kerrigan as the protagonist.