XCOM: Enemy Within, the substantial expansion pack on its way for XCOM: Enemy Unknown, has a new trailer, and it expands well beyond the original teaser.

As it states in the trailer, "These soldiers sacrifice much, but gain never before discovered combat effectiveness." You can augment your soldiers biological make-up or toss them into mechs to make them much more powerful in Enemy Within. The aliens have become more formidable as well. In the trailer you'll see an invisible flying squid pulled straight from The Matrix.

XCOM: Enemy Within is coming on the very easy to remember release date November 12, which 11-12-13 numerically. For more on Enemy Within, head here.