The year is 2049. The Second Cold War has brought NATO and the Russia-China alliance to the edge of open conflict. Before that edge is crossed, an enigmatic incident shatters the geopolitical framework entirely: nightmarish creatures of unknown origin begin appearing across the surface of the planet, driving entire populations into terror and chaos. Ethan, a young American pilot, is caught in the collapse. He fights back from inside a Mobile Armor — a powerful, fully customizable Mech — against the endless hordes of creatures threatening what is left of civilization.