I’ve not done all the due research here, as in I’ve not played every h-game on steam. But for the most part, from what I’ve seen, h-games on steam comes in a censored state with most if not all explicit content removed and having to be restored through patches that are not distributed through steam. This is how they get around this issue.
I can’t find a whole lot of info on Sakura Storm, but every instance of it I’ve seen so far it is listed as explicit and 18+ rated, this rating usually means there’s explicit sex scenes. I think Pyrrhalpis is probably correct in their reasoning. Chances are if they released a neutered version of this game that’s 15+ rated steam is more likely to allow it.
Just as an example
Steam version is “all ages” rated.
