Even as Rocksteady Studios's turned out two stellar Batman video games, other visions of the Dark Knight have shown up in Batman: Brave and the Bold and DC Universe. (Gotham City Impostors doesn't really count as players aren't controlling Batman, just his bizarre fan club.)
A new blog post from visual artist Julie Farrell there could've been one more interpretation of the Dark Knight, radically different than the rest. Designs on her webpage reveal work that was being done by Day One Studios on a version of a game based on Gotham by Gaslight , the alternate-reality Batman graphic novel published in 1989. Written by Brian Augustyn and drawn by Hellboy creator Mike Mignola, Gaslight focused on a turn-of-the-century Bruce Wayne trying to stop Jack the Ripper in Gotham City.
Farrell's designs show off a steampunk take on Batman's world and gadgets, and you can glimpse what the character himself in the bottom left of the menu screen. Nerds everywhere can weep into their comics that this game never came to pass. (I'm including myself in that group by the way.)