if you've played Arkham City then you'll know that the Joker dies but did you know that he actually dies twice when Batman finds Joker in the steel mill in Arkham City he finds him presumably dead in a chair strapped to an IV pole only to be pounced by the quote unquote real Joker who's actually not the real Joker is revealed to actually be the one and only clay face while the real Joker is still suffering from the after effects of the Titan formula so in fact the real Joker actually dies twice once from cardiac arrest and twice succumbing to Titan cancer