From time to time we have to deal in missions with a device that is capable of destroying a planet, a planetkiller, a doomsday device and I begin to wonder can it really exist. I am sure mankind and any other advanced civilization can make such a thing; that is possible in a technical way. But then there is the question why make it.
You can knock out a planet and everything that lives on it. Now there are countless planets in the universe so what is the point of killing one? A planetkiller is purely a weapon to destroy the people living on a planet, to kill a complete civilization. Now if this civilization is not space travelling, does not have colonized other worlds, you wipe them from the universe. Again, why should you do such a thing. If they are colonizing, space travelling, they may be a threat to you. As you are yourself colonizing space. Yet if you want to get rid of them, you have to kill all there worlds in one go. Hence one worldkiller is no worldkiller.
Space is big, there is no room for a planetkiller. We may be able to create one, technologically, but the same advancement and our knowledge of the universe will tells us, it is absolutely a waste of resources. Unless you just want to kill, as we do in this game.