Ugh, back when I used to care about grammar, I'd say you probably shouldn't use "did do" together (awkward and a redundancy, only use when you've heard reports of an attack, but now it's been verified, as in "I know they said it was attacked, but they sure did do incredible damage." (i.e. "sure did" meaning "it truly happened that way" rather than "it happened to a great extent")). Switch it to "did." That said, by the end of any game, I'm usually so braindead that even a coherent plot is a stretch.