I think a game based on Carnivale would be absolutely amazing. Creatures of Light versus Creatures of Darkness. Searching for a boon, battling Avatars, depression-era dustbowl setting. It could be a character-driven game. It's probably my favorite show ever made. HBO sadly cancelled it 2 seasons in. Good luck obtaining the rights for the game though. However, if there was a game, I'll bet there would be renewed interest in the show and then it could get brought back onto the air.

amazing show... game would need to rock.

It was a great show and it would be interesting to see a game of it. It could be the perfect opportunity for the story to be concluded as, if I'm not mistaken, the guy who made it had planned six series - three-parts: two seasons each. What we saw was a third of the tale. A game would do well to work through this, but could offer a chance to take it further.