XCOM: Enemy Within, a console caliber military strategy game, has just gone on sale for $4.99. This is the first time this game has ever dropped below its regular price of $12.99. It was originally released for the Playstation 3 and Xbox 360 and is graphically one of the best looking games on the Fire TV. In XCOM: Enemy Within you manage your military headquarters in real time and turn-based battles against invading aliens. Needless to say, this game is only compatible with the Fire TV and requires a game controller to play.