A free PC demo of XCOM: Enemy Unknown has been released via Steam, a couple of weeks before the full version of the turn-based strategy game from developer Firaxis is released.
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People who pre-order the PC version of XCOM: Enemy Unknown on Steam can help unlock special rewards as more and more people pre-order the turn-based strategy game.
The upcoming revamp of the X-Com strategy series, XCOM: Enemy Unknown, will also have a multiplayer mode where two players will battle it out in a one-on-one deathmatch.