Remember that time in the XCOM reboot where you saved the world from the alien invasion? Whatever good you did eventually got undone. By the time XCOM 2 begins, the world has been enslaved by the aliens for many years. At this point, the XCOM group is nothing more than an underground movement fighting with scraps. With the odds worse than ever, can you muster up the will to fend off the alien forces one more time?