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.
Carnivale the board game
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.