when i firs started reading it i thought you ment they have no platform up there and either way it would have to turn upside down  and i was going to answer Read the books (Atleast the first three)!!!! Then you find out that the ships have mac guns too. But then i read the rest and my real answer will be :A. that makes sense and B.Its just a game!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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stand stong,
even when fire rains from the sky,
and ash covers the world.