Sounds like an interesting aesthetic for a game project, I'd be happy to provide assistance! When people use term Dark Fantasy I assume they are describing something akin to Dark Souls, but with, as you described, a Sin City visual style. Hard, dramatic lighting, white - black - red color scheme. I can certainly provide this, and I'd be happy to discuss any additional details you may require.
The bid is for a single digital painting, but if you need additional assets for your Kickstarter campaign, I'd be happy to discuss those as well!