XCOM: Enemy Unknown

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.

That way, the underground HQ is expanded to have a larger reach with new structures and the player is also responsible for the management of finances and monitoring alien activity.

Players also need to keep panic under control.

If a certain region of country is left unattended for too long, the local government will cut back its contributions to the XCOM funding, slowing down the overall progress.

There are also often cut-scenes that further an overall story.

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 al

XCOM: Enemy Unknown for Xbox 360 is currently worth €8.60 loose, €3.50 complete in box, and €6.12 factory sealed. Prices are based on real sales and update regularly on Gamevaro.

XCOM: Enemy Unknown has a steady sales history on the tracked marketplaces, meaning it trades hands regularly and isn't considered particularly rare.

Loose means cartridge or disc only, CIB (complete in box) includes the original box and manual, and sealed means factory-sealed and never opened. For XCOM: Enemy Unknown, loose is €8.60 and CIB is €3.50 — CIB commands a premium because original boxes and manuals are fragile and often don't survive.

The PAL version of XCOM: Enemy Unknown is currently worth €8.60 loose, versus €7.13 for NTSC-U. Regional price differences usually come down to print run size and regional collector demand.