The Rail Wars anime series hasn’t even begun to air in Japan and it already has a video game. 5pb announced a Rail Wars game with a teaser site, but haven’t said any details about it. The genre and system(s) it will be released on have not been disclosed.
Rail Wars is set in an alternate version of Japan where the train system is still controlled by the Japanese government. The story follows Naoto Takayama who dreams of working on the railways.
Update: 4Gamer reports Rail Wars is a single player adventure game.