Humankind faces an unknown alien threat, and the only thing that stands in the way of annihilation is the top secret XCOM Project. Can these operatives turn the tide of battle, or will it be our last stand?ESRB Rated M for Mature: Blood and Gore, Strong Language, Violence. Visit www.esrb.org for rating information.http://www.xcom.com/enemyunknown/Find us on Facebook: http://www.facebook.com/XCOMFollow us on Twitter: http://www.twitter.com/2KGames