XCOM: Enemy Within

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XCOM: Enemy Within
North American cover art of XCOM: Enemy Within Commander Edition
Developer(s)	Firaxis Games
Publisher(s)	2K Games Feral Interactive (OS X, Linux)
Producer(s)	Clint McCaul Garth DeAngelis
Designer(s)	Ananda Gupta
Programmer(s)	Justin Boswell
Artist(s)	David Black
Writer(s)	Scott Wittbecker Liam Collins
Composer(s)	Michael McCann
Series	XCOM
Engine	Unreal Engine 3
Platform(s)	Microsoft Windows, Linux, OS X, iOS, Android, PlayStation Vita, PlayStation 3, Xbox 360
Release	Windows, OS X, PlayStation 3, Xbox 360 NA: November 12, 2013 (2013-11-12) EU: November 15, 2013 AU: November 15, 2013 Linux, SteamOS WW: June 19, 2014 Android, iOS WW: November 13, 2014 PlayStation Vita NA: March 22, 2016 (2016-03-22) EU: March 21, 2016 AU: March 21, 2016
Genre(s)	Turn-based tactics
Mode(s)	Single-player, multiplayer

XCOM: Enemy Within is an expansion pack for the turn-based tactical video game XCOM: Enemy Unknown. The expansion pack primarily adds new gameplay elements to the base game, as well as introducing new themes of transhumanism via aggressive gene therapy.

XCOM: Enemy Within was released for Microsoft Windows, PlayStation 3, and Xbox 360 in November 2013 and received generally favorable reviews from critics. In June 2014, Feral released both XCOM: Enemy Within and its base game XCOM: Enemy Unknown for Linux. The game also came to the iOS App Store and Google Play Store a year after the initial release, on November 12, 2014. On March 22, 2016, the game was released on the PlayStation Store for PlayStation Vita.

The Windows, OS X and Linux editions require XCOM: Enemy Unknown to play; Enemy Within was released for Xbox 360 and PlayStation 3 as part of the Commander Edition bundle with Enemy Unknown. The iOS and Android versions were released as stand-alone apps not requiring the original mobile port of Enemy Unknown to play. The PlayStation Vita version is only available bundled with Enemy Unknown under the title, XCOM: Enemy Unknown Plus.