An alien fleet intent on destroying us has landed on our planet. It is your job to thwart the invasion by strategically placing towers on their route towards our base. Use the money you’ve earned and ...
Isaac Arthur on MSNOpinion
They outlived their planet - then stopping became more dangerous than leaving, "keep moving"
A nomadic alien fleet may not be a species, empire, or refugee group in the way humans expect. It could be a moving ...
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