Found this over at Game Dev League, they have a special channel for discussing adult content with an appropriate barrier to entry for minors. They discuss Unreal Engine as well if anyone else is looking for a place to discuss games with R rated content. My fear is that child friendly content will become more prevalent moving forward to try to capitalize on the larger market but theres plenty of evidence to suggest there is space for adult content, even Hollywood underestimated the appeal quite dramatically until more recent times.