There's Multiic which is a game with a general plot but you fill in dialogue sections and sex scenes by prompting an AI. If you look up MoralHazard on Itch that developer has a couple games built around an AI, that is the games have a story premise and mechanics managed by the AI, but there isn't a fixed plot other than the premise.
For me the most interesting game with premade AI images is probably Albero Verde, but one day I'm hoping to actually get the Stable Diffusion plugin for Lab Rats 2 working on my computer. Currently its configuration generates garbage images unfortunately and I haven't had the drive to figure out how to fix it.