While a few pieces were shown here and there in the lead-up to the game's release, what you're about to see is a collection of mostly never-before-seen concept art from the production of one of the year's surprise hits.
Drawing in works from all over the place, from mood-setting paintings to gun designs to ideas on how a certain alien can ruin your mission real fast, it gives you a great idea of what Firaxis' drawing board looked like when coming up with ideas for the game.
Enjoy! Oh, and as a final treat, because many of these are straight from the artists - and not from a PR campaign or game site - most are at sizes you can easily use for wallpaper.
XCOM was released on PC, 360 and PS3 earlier this month. I, uh, rather enjoyed it.