Games are very heavily regulated. You have to get approval, and there is a process for submitting the rules for a new game and getting it approved. Often it's t

Games are very heavily regulated. You have to get approval, and there is a process for submitting the rules for a new game and getting it approved. Often it's the game makers who do this (and they sell the tables to the casinos for a license fee). It's easiest when it's a game that's very similar to an existing one.