XCOM: Enemy Unknown Last Stand E3 Trailer Shows Destruction and Chaos

2KGames has put together a new trailer of Firaxis' upcoming extraterrestrial-hunting turn-based strategy game, XCOM: Enemy Unknown.

The trailer was put together for E3 2012 and contains the (hopefully) final release date of the game, which is set for release on October 9 for the Xbox 360, PlayStation 3 and PC platforms.

The official description of the video reads: "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?"

The aliens look weird, the agents are well armed, and their jittery voice-overs exemplify the fact that despite being military veterans, they're dealing with a truly unknown enemy and know not what to expect.

The aliens include everything from your basic "Grey" sectoids to bizarre, shapeshifting creatures—some of which resemble giant mechanical insects.