A Fistful of Darkness

From the Intro:

Imaging a world with the magic and mystery of the frontier: wide open plains of the Old Wild West in all its beauty and madness, where violence and sacrifice dominate every single day. Now add the Hellstone rush, underground mayhem in mines and brand new sciences & machines. Don’t forget immigration, injustice, vigilante justice, outlaws, gunslingers, slick talkers and setting suns. This all in the face of an impending doom: Demons and the four riders bringing the end of the world as you know it. How do you make it to the top of this powder keg, which side will you take in the impending war and how much will your soul suffer? Let’s play to find out!