10 Ambitious Gameplay Ideas That Broke Everything

10. The Batmobile - Batman: Arkham Knight

Batman: Arkham Knight attempted to expand the series' open world further still by finally making the Batmobile fully playable - an awesome idea in theory which many were dying to see, and yet ended up being the game's overpowering undoing.

As neat as a summonable Batmobile sounds on paper, Rocksteady ultimately made players excessively reliant on the vehicle, enough that it becomes a genuine annoyance, the infamous mandatory tank missions proving especially groan-inducing.

Long before the game has reached its end, the Batmobile has outstayed its welcome, proving not merely an example of too much of a good thing, but how horribly misappropriated Batman's greatest "gadget" could be.

It's an addition to the series which ultimately tanks (sorry) the whole game, turning an otherwise thrilling wish fulfilment exercise into a stamina-annihilating bore. And let's be honest, is there anything worse for a freakin' Batman game to be than boring?