I've been messing with various sandbox "sex simulators" to see which one is the best in general but more specifically for netorase fetishes, this include games explicitly made to be sex sims, or games modded so it has sex in them.
I've tried
Sims 4 and recommended it before but IMO, the game is simply too basic of a social sim, and a huge hassle to set up your "ideal" scenarios. And more importantly the game models and physics just suck, there isn't even a collision simulation for genitals, even if there is one it only works on a few animations. There isn't a point for a sex sim if the models are bad and 90% of animations are patreon scams and ridiculously mediocre.
This takes me to
Skyrim, now skyrim has way better in game models with great physics and genital collision, also it has many great animations with a bunch of additional effects. It's probably the most customizable game for sex sim. The thing with skyrim is that 90% of the game's current content is for female protagonist corruption or slavery and bestiality, very little content tailored for sharing or NTS, unless you count follower prostitution or general "you make follower X fuck NPC Y". It is also a even great hassle for setting up and you will probably end up 70% of the time configuring mods rather than playing.
For
ILLUSION games such as Honey Select 2 or Honey Come, these games have great character models and tons of modded content, there is also the HUGE advantage that everything works straight out of the gate so there is very little to mess around before you can actually play, you just create a character and do *whatever* you want as long as the game allows; and this is kinda a problem because for being games made to be sex sims there is barely anything to do, they have very few animations, or interactions with the girls, or things to customize during sex animations. I would imagine a company making H games for like 20 years would have hundreds of animations per title with options for gangbangs or swapping characters or even roleplaying scenarios, but ILLUSION games become very boring very fast.
Now i've been playing
Koikatsu, more specifically
Koikatsu Sunshine, and it it's very much the exception for ILLUSION games, probably the only "sex sandbox" with decent gameplay, and a lot of it is thanks to
Ksplug. It's basically like HONEY SELECT, but anime style and dating sim elements if you want, but the thing that makes it better is the "touch" or interaction system, also the girls personalities are VASTLY superior and they have a way wider range of reactions of what is happening during H SCENES. But what it makes it great is honestly gameplay MODS specially KsPlug, one of the few illlusion games with modded sex animations, which in combination with the other features i've mentioned make some of the better h games scenarios. And i can't stress how good KsPlug is, it is basically a gameplay enhancement mod that allows for additional character invitation, girls and boys, and background h interactions with multiple NPCs, there is also a cum "shooting" setting, and girl "thinking" mode so main girls can do whatever they want... and ETC, honestly there is a lot of stuff to mention. you can do great stuff with it including NTS.
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