actually its almost impossible to make a unique story for this stuff new more less its some space type of game, theres been to many games, all can do is make a funner one.
also it is also diffrent in style you notice most games have plate mail from 13-16 centuries, this i were nights still wore chain mail and so on but are gradually inventing plate armor.

and its for fun and expierience , oh and also our own fun game to play ^-^
stop being so picky these days everyone expects way to much from everything
and we can alter and change the story according to our needs.