Due to the nature of the field — one in which art can be locked away for years — and also the fact I often share images from older games, I'm not going to simply post the best art (both concept and promotional) that's appeared here in 2012, because it's been from all over the place. Nor am I going to post the best images from 2012 because, as explained above, most of those are probably still under lock and key for a few years.
So I'm going to post the best pieces of art for games that came out in 2012. That seems the most fair!
The gallery above features art from games like Mass Effect 3, Syndicate, Assassin's Creed III, Halo 4 and Guild Wars 2, just to name a few. I've only selected one piece from each game; the links to the credited artists in the gallery will take you to a lot more.