StarCraft enhanced on its predecessor Warcraft II, which highlighted two really equivalent playable factions, by introducing asymmetry among the units and systems accessible to its 3 races (Protoss, Terran, and Zerg). This asymmetry was much like that pioneered within the lesser-recognized 1996 SSI launch War Wind. The device varieties available to each race determine its racial identification. The Protoss can discipline effective and costly warriors and equipment, when the Zerg rely on sheer numbers and speed to overwhelm their opponents.

The story focuses on the functions of three species inside a Portion of the Milky Way often known as the Koprulu Sector. Millennia right before any of the occasions in the online games, a species often known as the Xel'Naga genetically engineer the Protoss and afterwards the Zerg in tries to create pure beings.[11][12] These experiments backfire and also the Xel'Naga are mostly wrecked with the Zerg.[twelve] Hundreds of years ahead of the start of StarCraft in 2499, the hardline Intercontinental 격투기 govt of Earth, the United Earth Directorate (UED), commissions a colonization application as Element of an answer to overpopulation.