The aliens in X-Com: Enemy Unknown are not here to make nice and share, they are here to take over and destroy! You will have to command your troops and defeat the aliens so bad you send them packing back to where ever they came from. Should you fail there will not be a single human left so you know what to do! Be sure to check out the action packed, alien blood soaked trailer below.
Source Link: YouTube | http://www.xcom.com/enemyunknown/entry
