The random number generator used in those games will most likely be buried inside a microcontroller of some sort, and you will also have no access to alter it's predefined control path. You will need to disconnect their intelligent circuit from the LED interface, and replace it with one of your own, with your own code inside a micro...if you have no access to the interface because it's directly driven from the micro, then you will need to start from scratch with it. I wouldn't think it would be worthwhile...