Brood War is, as you probably well know, the add-on to StarCraft, one of the best RTS games to come out for a long time. Continuing the saga where Starcraft left off, it again puts you in charge of either the resourceful Terran, the powerful Protoss or the ravenous Zerg as you attempt to gain control of the galaxy. Here, however, the similarity stops. In fact, Brood War is more of a sequel to Starcraft than, say, Tomb Raider 3 is to its predecessors. Because it isn't just a bunch of levels that the Blizzard programmers knocked up when they were bored, its not just lots of maps that you can get off of the Internet for free anyway.
Brood War is almost a whole new game.
Kerrigan, the self-proclaimed Queen of Blades, is now the sole ruler of the Zerg, after the Overmind was destroyed when Tassadar sacrificed himself for the Protoss cause. Now, however, after a short resting period, in which the three races managed to create new weapons of war to further enhance their efforts to destroy each other, the battle for supreme dominance will rage across the galaxy once again. The Corsair is a new flying unit that fires small bursts of energy at it's opponents. However, it can only attack air based units, but also has a disruption Web spell, that prevents ground based mechanical objects, such as Terran Bunkers and Missile Turrets, from firing out of the Disruption Web. Dark Archons are formed in much the same way as a regular Archon, but instead, two Dark Templar merge together to form one entity.