The Grunt Invasion is about an invasion of the Milky Way Galaxy by a race called "Grunt" their opposition are the Terran (humans), The Daraga (which are supposed to be the mysterias race of the mod) ,the Nizar (which are sort of a father race to all aliens and the humans but that dosent mean that they are good), the Yeylin (An Allianced Pirate race which means that they are pirates but th're organised and grouped together), the Heimon (Completely Evil and Mysterious race), the Torell (Military race), the Zelex (A race which is part of the Torell Empire) and the Vazarn (A race that takes tech from many spcieces and joins it together into their ships). The Daraga, Nizar, Yeylin, Torell, Vazarn, Heimon and Terran must defend their worlds against the Grunts and eventually fight back with a vengence. They will also join sides or make enemies.