Centuries ago, an ancient race, the Xel'naga, experimented on two species: the psionic Protoss
and the insectoid Zerg.
The Protoss worshipped the Xel'naga, but to control the vicious Zerg, the Xel'naga created
the Overmind.
Unfortunately, the Overmind turned the swarm on its creators and the Xel'naga were never
seen again.
The Protoss resolved to stop the Zerg, but during the Great War, their homeworld of Aiur
was lost.
Forming a shaky alliance with their exiled brothers, the Dark Templars, the Protoss retreated,
but Dark Prelate Zeratul, learned of experiments on a Zerg/Protoss hybrid and left to investigate.
Meanwhile, Terran soldier Jim Raynor lost his partner, Sarah Kerrigan to the Zerg.
Abandoned by her commander, Arcturus Mengsk, Kerrigan was transformed into the Zerg/Terran
hybrid, the Queen of Blades.
Through treachery, she recruited the Terrans and Protoss to destroy the new Overmind then
took control of the Zerg Swarm for herself.
Betrayed, Raynor vowed to kill Kerrigan, but she now commanded the most powerful force
in the galaxy.
Then, without explanation, she gathered her swarm and vanished.
Four years later and in between drinking binges, Raynor leads raids against Emperor Mengsk,
but it's time to sober up.
Kerrigan has returned to uncover mysterious Xel'naga artifacts, compelled by an ancient
voice.
The voice of an ancient evil born anew.
Have fun!