2K games and Firaxis released a new trailer for XCOM: Enemy Unknown's upcoming expansion named XCOM: Enemy Within. When it was revealed, we got a small tease, now we get to see what's in store for us in this major expansion.
XCOM: Enemy Within brings back the meaning of major expansion with all this new content added into the original game. The expansion will include 47 new maps, new weapons, new alien units to go against, a new resource to scavenge, and the ability to alter your soldiers genes to become more effective in combat.
XCOM: Enemy Within will be out on November 12, 2013 for PlayStation 3, Xbox 360, and PC.