XCOM: Enemy Unknown: Complete Pack

XCOM: Enemy Unknown is a turn-based tactical strategy game that incorporates role-playing elements and it is a reimagined remake of X-COM: UFO Defense. The game is set in the near future when Earth is invaded by aliens. The player is put at the head of the elite multinational military organization XCOM (Extraterrestrial Combat Unit) tasked to defend Earth against the invaders as regularly military actions remain without result. This is done through a series of missions where the player commands a small troop. Between missions the larger management aspect is tackled through research and development to create new technologies and weapons using captured aliens and technology recovered from the missions.

For missions a squad of four to six soldiers is selected from a pool of about twenty. Missions are set in small areas usually centered around a specific building. Missions are shown from a 3D isometric-style, floating view and a fog of war shrouds most of the environment until the soldiers uncover it with their line of sight. Solid walls often become invisible while browsing to provide a full view of the environment. After guiding soldiers and determining a plan of attack, it is possible to switch to a much closer tactical view to decide how to attack. The action is done in turns and percentages are used based on the soldiers' abilities and positions to determine how successful actions are. Terrains are often fully destructible leading to situations where new cover needs to be sought or the strategy needs to be altered after a part of the environment has been blown up.

The Complete Edition includes:

- XCOM: Enemy Unknown (base game)

- XCOM: Enemy Within (DLC)

- XCOM: Enemy Unknown: Slingshot (DLC)

- XCOM: Enemy Unknown: Elite Soldier Pack (DLC)