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Instead of constructing bases all around the world, gamers conduct business from a massive underground bunker that is sliced in half to offer something of an ant-farm view, and they launch satellites to keep watch over specific countries.
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To fight back, the world's governments have formed an elite paramilitary organization, and as commander of this "Extraterrestrial Combat Unit," players must coordinate a worldwide effort that includes planning combat missions, controlling the soldiers in battle, researching and reverse-engineering alien technology, and creating and upgrading the XCOM base. A re-imagining of the popular and influential 1994 PC title X-COM: UFO Defense, XCOM: Enemy Unknown takes place in the near future when hostile and technologically superior aliens have invaded Earth.
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