I still don't know why this game was banned on Steam, fortunately even banned games are saved on servers and in the library
All games featuring rape or incest were removed from Steam because some group of Karens from Australia sent thousands emails to payment processors (Visa, MasterCard, PayPal) complaining about those games and those companies finally bent their knee and pressured Steam into removing a lot of porn and horror games. There's a big drama ongoing at the moment about it, because those companies have duopoly and try to create their own laws by refusing to process payments from some merchants if they don't like them.
USA's government got involved in it, too. They are planning to introduce law that forces payment processors to process payments for everybody, as long as it doesn't break the law (so their unclear, made-up rules don't matter).