The Zerg receive the Lurker, obtained after mutating a Hydralisk, which can, and actually must, burrow to attack. They also obtain the Medic, which can heal all non-mechanic units and, through upgrades, can use the Restore (remove all ailments on a unit) and Optical Flare (reduce the sight range of an enemy unit to 1) powers. The Terrans receive the Valkyrie, a craft with air-to-air fighting capabilities. Fearing for the safety of Earth they sent an expeditionary fleet there to secure it.īrood War brings several changes to the game, altering some gameplay aspects of the game, the most important change being the addition of new units. Meanwhile the United Earth Directorate (UED) have learned of the recent developments in the sector. The Protoss are evacuating what is left of their people from their ruined home world. Kerrigan, a human/Zerg hybrid however wants to take control of the Zerg herself. In an attempt to regain control, a number of cerebrates merge to form a new Overmind. With the demise of the Overmind on the Protoss homeworld at the end of the original game, the Zerg are left leaderless. StarCraft: Brood War is an expansion pack for StarCraft and a direct continuation of its story.