Once you do, though, X-Com will prove to be an engrossing experience with lots of replayability. XCOM: Enemy Unknown is a 2012 turn-based tactical video game developed by Firaxis Games and published by 2K Games. Expect to restart a few times while you feel your way around the game. Download XCOM: Enemy Unknown for free on PC this page will show you how to download and install the full version of XCOM: Enemy Unknown on PC. X-Com has a lot going on, so it may take a while to get the hang of the interface, economics, and tactical strategy necessary to succeed. Have your scientists research alien technology to discover the secrets of the invaders while your engineers mass-produce the advanced war-machines necessary to stop the threat once and for all.

Shoot down UFOs with interceptors and send teams of mercs with your best equipment to eliminate threats on the ground. You must build, improve, supply and manage bases across the world to protect funding nations from alien invaders.

You are tasked with defending Earth from a massive alien invasion, from the first UFO reconnaissance to the waves of warships descending on the world's major cities. In the not-to-distant-future of 1999, the paramilitary extra-governmental X-Com organization is all that stands between mankind and destruction. X-Com combines elements of real-time strategy, 4X, turn-based tactical, and even some RPG to create something as fun and addictive as it is complex.

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