Think you saved humanity...? Not so fast! On the eve of your glorious campaign to retake the galaxy, a new threat emerges. Fight the Creeper in a new environment while you excavate and build your industry of war.
Organic monsters want to capture our planet. People are in danger! Kill all enemy aggressors. Build your towers and battle units and strike a SMASHING BLOW to the foe!
In year 2222, people invented a portal. In year 2281, the first habitable planet is found. Its colonization is made through portals and it turns out that humans are not the only sentient race in the universe..