You can't help everyone, and time is just as important a resource is money. When aliens invade, the countries of Earth band together to form XCOM, a counter measure to stop the invasion.Fighting aliens is all well and good, but the real key to XCOM has always been learning to choose your battles. XCOM is an old top down, turn based, strategy RPG, filled with micro-managing units and bases, production, and keeping the various countries on earth happy.