Unless your able to decipher the meaning behind 'Achievement_74' and so on, it seems we'll have to bide our time skulking in our undisclosed XCOM base locations beneath the surface.
Thespilled the beans of alien origin. The South Korean ratings board recently listed 'XCOM: Enemy Within' and 2K Games acknowledged it.
It was unclear what form this Enemy Within would take but given the large number of achievements now added to Enemy Unknown, it would appear it's a fairly sizeable expansion on the way. Firaxis has said they'd like to add more to their XCOM rendition which has seen enormous critical and commercial success.
Gamescom 2013 commences August 21st, with it opened to the public 22-25.