Marcin Surma posted a gallery of concept and promotional art he created for the in-development shooter Superhot:
You can try the game demo at the official site, read Kirk's impressions of the game here, and see more of Marcin's work at Tumblr. Here's his efforts to redesign Batgirl:
You are now looking at Screenburn, a Kotaku blog dedicated to the best gaming images, videos and GIFs online.