StarCraft improved upon its predecessor Warcraft II, which featured two very identical playable factions, by introducing asymmetry concerning the models and systems available to its three races (Protoss, Terran, and Zerg). This asymmetry was similar to that pioneered during the lesser-recognised 1996 SSI launch War Wind. The unit varieties available to each race determine its racial id. The Protoss can discipline effective and costly warriors and machinery, though the Zerg rely on sheer figures and speed 다이어트 to overwhelm their opponents.

We realized that our Terrans ended up likely to be rough and filthy. We understood we desired the Protoss to becomenot savage, exactly, but primal, and impressive. And we realized we wished the Zerg to swarm."