Do you think the story shown in homefront video game is possible? How can north korea defeat USA?

I know its only a video game but I still had to ask in this section .I am not much of a gamer but this game was controversial and I watched a few videos and I bought it like a kid and it does bring hatred in your veins. Even many of you might have reacted badly to your fellow asians if you had played the game or am I just too emotional because I never get emotional by little things. Watching that scene where that couple is gunned down by that korean in front of their 6-7 year old son was like a bullet through the heart.