Survive the onslaught. Rescue your teammates. Fight back against the planet.
You and your team are interstellar diplomats from the planet Yoofo, and you've just received your latest orders: find and destroy the other planets in this quadrant of the galaxy.
At least... you're pretty sure that's what they said; the signal gets spotty out here. It's an unusual mission for your department, but hey, diplomats are nothing if not adaptable.