XCOM 2 is a turn-based tactics video game developed by Firaxis Games and published by 2K Games. Is the sequel to 2012's reboot of the series, XCOM: Enemy Unknown. Taking place 20 years after the events of Enemy Unknown, it follows the continuity that XCOM, a military organization trying to fight off an alien invasion, has lost the war, and is now a resistance force against their occupation of Earth. (fuente)