A sequel to the game, titled XCOM 2, was released on Februfor Microsoft Windows, OS X, and Linux.

A number of publications, including GameSpy, GameTrailers and Giant Bomb, named it Game of the Year. XCOM: Enemy Unknown was critically acclaimed, with several reviewers commenting on the game's difficulty, replayability, and addictiveness. A bundle containing both Enemy Unknown and Enemy Within was launched on the PlayStation Store for PlayStation Vita in March 2016 under the title XCOM: Enemy Unknown Plus.

In June 2014, Feral released both XCOM: Enemy Unknown and its expansion pack XCOM: Enemy Within for Linux. An expansion pack, titled XCOM: Enemy Within, was released in November 2013. A port for iOS was released in June 2013 and an Android conversion was released in May 2014. An 'Elite Edition', containing all previously released downloadable content, was released for Mac OS X by Feral Interactive in April 2013.

XCOM: Enemy Unknown was released for Microsoft Windows, PlayStation 3, and Xbox 360 in North America on October 9, 2012, and in Europe and Australia on October 12, 2012. 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. 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 game is a 'reimagined' remake of the 1994 cult classic strategy game X-COM: UFO Defense (also known as UFO: Enemy Unknown) and a reboot of MicroProse's 1990s X-COM series. XCOM: Enemy Unknown is a 2012 turn-based tactical video game developed by Firaxis Games and published by 2K Games. Turn-based tactics, tactical role-playing

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