Unlike last year, there's been a bit of space between E3 and Comic-Con this year, and that means: the games on hand have had a couple of months to be refined. That was acutely on display over at the Uncharted 2: Among Thieves area of the PlayStation booth. Naughty Dog unveiled a new co-op gameplay type, Gold Rush, but that was only part of the story. As a veteran of the Uncharted 2 beta, the visual and gameplay enhancements were evident as soon as I picked up the controller. Naughty Dog's Arne Meyer explains Gold Rush, and (at the end) shows you why you need to drop by and play the demo at this Comic-Con if you can make it.