The UNKNOWN SYSTEM is the ninth and final "planet" of the story mode. It contains just one assignment, a defense assignment named End of the Line.
Ad blocker interference detected!
Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers
Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.