StarCraft enhanced on its predecessor Warcraft II, which featured two quite identical playable factions, by introducing asymmetry in between the units and systems accessible to its three races (Protoss, Terran, and Zerg). This asymmetry was much like that pioneered while in the lesser-recognised 1996 SSI release War Wind. The unit varieties accessible to Each individual race determine its racial identity. The Protoss can discipline highly effective and expensive warriors and machinery, whilst the Zerg rely on sheer figures and pace to overwhelm their opponents.

The story concentrates on the actions of 3 species inside of a Portion of the Milky Way often called the Koprulu Sector. Millennia prior to any on the events from the online games, a species often called the Xel'Naga genetically 헬스 engineer the Protoss and later the Zerg in makes an attempt to build pure beings.[11][12] These experiments backfire as well as the Xel'Naga are mostly ruined by the Zerg.[12] Hundreds of years in advance of the start of StarCraft in 2499, the hardline international authorities of Earth, the United Earth Directorate (UED), commissions a colonization software as Component of an answer to overpopulation.