XCOM: Enemy Unknown

XCOM: Enemy Unknown is a 2012 turn-based tactics video game developed by Firaxis Games and published by 2K. The game is a "reimagined" version of the 1994 strategy game X-COM: UFO Defense (also known as UFO: Enemy Unknown) and a reboot of MicroProse's 1990s X-COM series. Set in an alternative version of the year 2015, the player controls an elite multinational paramilitary organization called XCOM during an alien invasion of Earth. The player commands troops in the field in a series of turn-based tactical missions; between missions, the player directs the research and development of technologies from recovered alien technology and captured prisoners, expands XCOM's base of operations, manages finances, and monitors and responds to alien activity.