Apparently, Fable Heroes is a forthcoming XBLA game from Lionhead Studios that has been unceremoniously leaked by the Xbox Live Marketplace. The screenshots in the gallery below show the rather cartoony game's four-player multiplayer, which the title's blurb describes as simultaneously cooperative and competitive.

Said screenshots also show a distinctly board-game-esque game board, which makes us think that Fable Heroes may be a Mario Party-ish friendship ruiner couch multiplayer game. Players will earn gold coins that can be spent on "upgrades, characters, and items in both this game and Fable: The Journey for Kinect for Xbox 360." We wouldn't be surprised if Fable Heroes' actual announcement happens during this week's Game Developers Conference.