Looks like we have another contender for the least able to read award in this thread. House Party on Steam is censored, Steam took it down last year for a while until the devs submitted a new version that Valve had to approve. If you want the game in its full glory on Steam then you have to patch it after you get it. Mutiny is on Steam as well, but you can't see any of the futa action without patching the game, there are dozens more I can list in the same boat. So please stop pointing to House Party as if it's some smoking gun that Steam allows porn games that none of us has ever heard of, when neither could be further from the truth.
Here again I share the Steam Direct link:
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And for the lazy fucks who won't even bother to open the link and navigate down to the rules and guidelines section, here is a clip and paste:
I added bold to the 5 rules most likely to cause issues for various games found here. As of this moment you won't get a straight up porn game approved. That may change in the near future once Valve finish revamping Steam for better filtering and more accurate game content descriptions. Until those changes roll out, the above rules will likely stay the same as they've been since Direct became a thing.