I'm playing Bounty Train, a locomotive management action game by Corbie Games and Daedalic Entertainment.
The game features a campaign mode that offers story-based missions and a more freeform sandbox mode. Access to new cities on the map of the Eastern United States is gained by purchasing them; money is primarily earned by transporting passengers, mail, and goods to specific locations, though goods can also be shuttled between destinations for a tidy sum. Money can also be used to upgrade your train, purchase guns, and hire characters to defend against attacks. The tactical battles are similar to FTL, and they become more interesting when special abilities have been unlocked through experience. Although the game can get repetitive (modest profits make for a lot of grinding), the setting and premise of Bounty Train is engaging.