Originally Posted by jolle
Could be due to the brutal contrast, or sharpen filter.
I doubt someone bothered to go in and paint detail into the entire image.
They didn't. I ran the original through the Gimp and came up with something pretty close to what they got. Just desaturate it, decrease the brightness, and apply an unsharp mask and you get essentially the same thing. They did a few other things, but I think the unsharp mask is what makes people think it looks better, and that can't be done in real-time so it's really cheating just like when game companies do post-processing on their screenshots.
Mine (if it looks nothing like the one above blame it on my crappy work monitor - trust me it does here):