BioShock Infinite, were hard at work on a game that never made it off the ground. It was a role-playing game crossed with a real-time strategy title, and it was aimed at consoles. As revealed on the Irrational Games blog, the game was known as "Dungeon Duel" never got past the concept stage.
The gameplay seems to be a mix of dungeon crawl and card-based strategy, with cards representing actual monsters and spells rather than operating on a numbers level. Combat was described as both "fast-paced" and "real-time," though the design doc fails to go into too much detail -- it's an early pitch, after all. A handful of concept art shots and in-game artwork were also made available, which you can see over on the Irrational blog.