"Brood War" is an expansion pack for the popular real-time strategy game StarCraft, released in 1998. It introduces new units, abilities, and a continuation of the game's storyline, focusing on the conflict between three factions: the Terrans, Zerg, and Protoss. The expansion is known for its balanced gameplay and competitive scene, which has contributed to its lasting popularity. The game features a single-player campaign with new missions and characters, as well as a robust multiplayer mode. Brood War has been influential in the esports community, particularly in South Korea, where it became a cultural phenomenon and helped establish professional gaming as a legitimate sport.