I download anything I find remotely interesting. But then when checking my folders for things to play I mostly forget what the games were or why I downloaded them...
Might be fun for the first few times, but after you play a few you realize how many of them are too lazy to even get the clips themselves and just use the same characters for the same tropes so they can reuse the pictures that have already been saved from other games (Ava Adams mom, Riley Reid...
It is not impossible to make a good AVN with little to no porn, but in my opinion it would be a good AVN despite the lack of porn and not because of it. I think most people want some porn from their AVNs. So even if you plan to focus on story I think a good sex scene early on will help hook in...
From the top of my head Such a sharp pain, desert stalker, bad memories.
There are many more if I go back and take a look at all I played throughout the years though, incest is by far the most stacked category.
Many of them miss the mark, but there are plenty of full sandboxes like Harem Hotel or A House in the Rift that make a shit ton of money so financially the concept isn't a failure.