games are there yeah so it's maybe a little bit easier to start with what kinds of generative models are there other than Gans so most generative models are likelihood based where to train them you have a model that tells you how how much probability it assigns to a particular example and you just maximize the probability assigned to all the training examples it turns out that it's hard to design a model that can create really complicated images or really complicated audio waveforms and still have it be possible to estimate the the likelihood