Greed

Yeah, you may have played this game before, probably worked flawlessly and had fancy animations. But could you change the amount of properties on it? Could you shuffle the order of them? What about playing with 69 sided dice? Probably couldn't. Greed lets you change so many settings and implement so many house rules that I can't guarantee it will work properly. (Mainly because no one wants to play several full games to playtest).