10: Everything and the Kitchen Sink
Mass Effect used to have enough originality in it to matter, to be more than the sum of its parts which have been borrowed and gotten inspiration from all over the sci-fi writing of the past centuries. But when the internal consistencies flew overboard during the course of Mass Effect 2, when that game then ended with that ridiculous reveal mentioned in #1 the seams burst and the franchise being made up from cliches and tropes from other, better sci-fi writing became gratingly clear.