StarCraft is a real-time strategy game set in a distant sector of the Milky Way galaxy in the 26th century. Players command one of three species across separate campaigns: the Terrans, resourceful human colonists cut off from Earth; the Zerg, an insectoid swarm that assimilates other species; and the Protoss, a technologically advanced race with powerful psionic abilities. Each species features distinct units, structures, and strategic options. The game includes a story-driven single-player campaign for each faction and competitive multiplayer via Battle.net.