Image a world with a clothing system where the rules and history of the world declare what is seen as decent and whats indecent, a world where you as your character could embrace your exhibition urges, becoming the nude terror in the night as evidence of your crimes keep piling up. A world where you could be punished, maybe even sexually for doing such crimes. Keeping stats of who saw how much of you, what is socially accepted and required similar to rimworlds idology system. What if you get detected and being advanced on? The city rules might support the aggressor instead of you who dared to go out naked. Or another character who likes to find their true loving bird, one that searches and searches for their partner in life only to find out that they may not be as pure who they first think they were. Crossdressing and being confused as the wrong gender with a deep system of whenever or not people will have the "if its a hole its a goal" mentality or maybe the character was forced into crossdressing and can plead to convice others that they are indeed a certain gender. Maybe animals have more rights than humans, maybe humans don't have any rights at all and its a strongest will surive mentality.
There are so many ways you could create such a world and its inhabitence, an open framework designed to allow deep interactions between multiple kinks, a point system of what becomes avaible when, a "simulated realistic" decent into depravity.
Of course its all just rambling of a game that probably will never be made and i cannot blame anyone for not trying or succeeding. Such a project would be too big for a single dev to get right maybe or simply not worth the effort. I been thinking about making it an official non hentai game for the general market build in mind with the idea of an unoffical offical 18+ mod that brings in all the content i just mentioned and more. A game where you can create and generate a world to your liking, whenever it is actively supporting your kinks or going against it without ever feeling like "you did nothing" or "nothing is happening". Thats my main problem with Dwarf fortress and Rimworld, these games are simulations and colony sims, but it feels like you "seen everything" in 24 hours of gametime where everything else is nothing but the same reskinned under a new word. To make such an ambitious game work you would need an miracle and an iron mind to not get too side tracked.
Things that could be included:
Town, City growth simulation, day to day trading and financial behind the scenes activities (unless your character is in a position to effect these themselves), a fully build school, work system with multiple jobs and activities that interact with all these jobs from school bullying to masturabtion in class to being pushed around by higher ups and exploiting others for your own gain. Entire housing market, entire car and fuel market if it is supposed to be the modern era of game, so many life paths from jobs that help grow the town/city, everything would have an simulated + - mood influence on npcs and the player, making npc management important. From many moods like Happyness, sadness, stress, anger, hope, despair, horny, willpower, health, trauma, hunger, cleaness, all these could be considered to personal values and how npcs or the player would feel from events happening, for example a hopeful happy worker might ignore their high stress levels in a situation that specifically calls for how a character would act under stress. An entire clothing and visibility setting, an entire gender setting (not that i am huge on the entire woke scene, but things like femboys and traps are usually done wrong in hentai media. Make it so people are unsure what you are, doubting themselves or refusing to believe that you are not what you may appear as), free time activities, crime rates, police and judgement system, earn money or be actively growing up. Time could usually run slow to really feel like you are playing a person rather than a person stuck in time skips while also make the entire system be able to fast forward without breaking. Animation system, Combat system, grapple system, toggleable urination mood, Damaged clothing systems, Body part system that might even be used to allow furry content and body harm things, accidents, light hearted modes, brutal modes