This is an attempt to flesh out a translation of the video game into a feasible RP style game. I have posted the idea here in order to gain feedback from a bigger audience.
[WARNING: "POSSIBLE" SPOILERS FOR XCOM ENEMY UNKNOWN]
It started with a story idea (fanfic disease *cough cough) of a scenario where aliens come back and ends up occupying most of Earth and humanity faces possible subjugation, if not extermination. There was this "Hearts of Iron III" (a VERY complex WWII simulation game) video I watched long time ago where a guy was asking the question of what if at the start of the war, Japan occupied Hawaii instead of just bombing it, and it lead to a situation where US was forced to helplessly try to take Hawaii where Japan dumped all their naval forces(eventually the guy nuked NYC and D.C. just for the irony).