Earth has united under the banner of the Republic. Humanity's brightest minds have deciphered the secrets of the alien technology and have begun to reverse engineer it. An elder race takes notice of humanity's strides and intervenes.

Humanity is brought into the fold of a galactic alliance and learns they are not alone in their war against the insidious Zodark empire. Humans now fight alongside friendly alien races to end the bondages of slavery. Earth leads a planet-hopping campaign to destroy the Zodark empire and liberate tens of billions of people across the Milky Way galaxy.