I am Commander Shepard, and I will win this war without compromising the soul of our species. Until I commit mass genocide or become a godlike (and no longer human) being or forcibly enact the homogenization of every single living being in the entire universe, that is.
Leading to what has to have been the most publicized outcry due to a game's ending, well, ever, Mass Effect 3's final moments are both controversial and flat-out stupid. Prior to the Extended Cut, which was the narrative equivalent of putting plywood boards over a gaping chasm (oh, so the Normandy is going to park in front of Harbinger for a few minutes while I have a tender scene with my love interest? Thanks for "clarifying," Bioware), the ending was simply a series of sequences that were thematically inconsistent with the rest of the plot and completely contradictory to the ideals players had been told they were fighting for over the course of three games. Twist endings aren't unusual, but they're rarely pulled off with such utter ineptitude. Remember how tonally inconsistent the theatrical "happy ending" of Blade Runner was with the rest of the film? That's exactly the mistake Bioware made in ME3, only in reverse. Top that off with a number of plot threads that seemed to be leading somewhere else (which many players ran with, forming the indoctrination theory), and you've got a recipe for the dumbest plot twist of all time.