StarCraft: Brood War, released in 1998, is the expansion to Blizzard's landmark real-time strategy game, and it is widely regarded as having completed rather than merely extended the original. It continues the story directly after the base game, following the three-way struggle between the human Terrans, the insectoid Zerg, and the psionic Protoss, with a campaign that deepens the saga and its characters, notably the rise of Sarah Kerrigan.

What made Brood War so enduring was how carefully it rebalanced and enriched an already excellent design. Each of the three races plays in a genuinely distinct way, and the expansion added new units to all of them, sharpening the strategic rock-paper-scissors that defined competitive play. The result was one of the most finely tuned RTS games ever made, a title whose balance held up under scrutiny for an extraordinarily long time.

Its legacy is almost impossible to overstate. In South Korea it became a national pastime and effectively founded professional esports, with televised leagues and star players commanding huge followings for well over a decade. The astonishing skill ceiling, measured in precise commands per minute, kept top-level matches thrilling to watch and nearly bottomless to master. Even now its clean design and demanding play make it a benchmark against which strategy games are still measured, a genuine cornerstone of the genre.