can some one please explain the storyline of this games it there somwhere but i get lost once people start yelling at me to desrtoy or save the ark whats the underling theme of this game the mystry of the plot or is it just straight forword

and whats with the random audio logs its cool and all but . . . .whats the point i mean are they doing dlc for them or what

would be kinda cool have the retro(nice and shiny ark to fight on) a clean containor city like one of the loads screens if anyone has seen the image