In the year 2015, Earth comes under attack by alien forces.In response, a secretive Council of Nations activates the XCOM project, a Multinational Team tasked with fighting the alien invaders and researching their technology to protect humanity.
The main focus of the game, however, is on the ground combat, where the player takes control of a small squad of soldiers and fights turn-based battles against the aliens.
Every soldier is equipped with one primary weapon, one pistol (Heavies get a Rocket Launcher instead), and an additional piece of equipment that the player decides (such as a grenade or medikit).
Outside of combat, the player manages the XCOM base, where you're forced to choose which upgrade projects to research, what weapons/items to build, what new facilities to build, and which alien threats to go after with your limited resources.
I was impressed that the Agency (CIA) deftly avoided any significant reform, even after multiple congressional inquiries into their illegal, unconstitutional activities which the disclosure of MK-ULTRA prompted, and was disturbed by the glaring lack of information regarding the program in the general public.
The main story spans over twelve chapters plus a prologue.