I'd rather not.
Most Unreal Engine games on here, even the "good" ones, have: poor optimization, poor lighting, a lack of content, somehow offering less interaction and customization options than 2D games even though the point of 3D is you're supposed to have more freedom, and give the user a great amount of dryspell where they think and say "oh but if only it had more development time and became more fleshed out". I've been playing adult games for a long time and Unreal Engine based adult games almost never fail to disappoint.
Some examples:
Breeders of Nephelym? It's been at least 8 or 9 years at this point and it's still not finished and it still feels like a "game with potential". At least the dev didn't make the mistake of switching to Unreal Engine 5 (though he attempted it). Unreal Engine 4 lags a lot less. The eugenics system is kind of neat and it's what kept me coming back for more, but it was VERY VERY grindy to breed and get the creatures you want and there are like FOUR total faces and hairstyles, but with different makeup and eye sizes or whatever (this is what I mean by strange lack of customization in a 3D game).
Carnal Instinct? Runs okay-ish, but oh my goodness development is at a snail's pace. It is however the most "complete feeling" game despite clearly lacking most of the story and missions they planned. It's been in development for several years as well, a lot of time was wasted switching from Unreal Engine 4 to 5. An *attempt* at customization is made but you get locked out of sex scenes due to the character's sexual preference. It reminds me of when in Daikatana the co-op AI refuses to pick up a weapon because they "don't want it" when in reality if they used the weapon it would get the player killed due to splash damage or some other problem. The devs probably couldn't be bothered to accomodate more than one body type or something for some scenes? I don't know. Some characters DO have multiple sex scenes and options but it's implied it takes a lot of effort.
Wildlife? Runs the worst of the bunch. The art style is quite ugly too. It's a pain to even think about it. Simultaneosuly high effort and simultaneously "what the hell is going on? why is it so... messy? incomplete?". Some people comment how it's only "good" for the sandbox/scene-editor. This one suffers A LOT from lack of *actual* customization. In Carnal Instinct for example it's very easy to take a woman body and try to turn it almost into a femboy by flattening the chest all the way and adding a penis. In this game the body type really can't be altered in any significant way other than adding a bit more muscle or removing a bit of muscle. This game ALSO wasted time switching from Unreal Engine 4 to Unreal Engine 5.
In ALL THREE GAMES you can't modify the dick size of the characters by the way. Only in Wildlife there is some sort of proper cumming system where the semen lands where the cock was aimed and it doesn't matter anyways since that game is an incomplete hellhole. These two "small" details I just mentioned really highlight how limited these Unreal Engine games are. All three games have been in development for probably at least 7 years, and at this point I'm sure two of them have been in development for close to 10 years.
EDIT: I just remembered Waifu Dreams City was made with Unreal Engine. That's one of the rare exceptions where the game is quite fleshed out. It's a bit distracted but still a good game. Even that game has performance problems, but the dev tries their best and I really appreciate them for that. Not only is the game fleshed out, it's one of the few games where you can actually customize not only your character but temporarily customize other characters in the game and have it all work when you have sex with them. Great game, but the exception to the rule. END OF EDIT.
If you read this far. Thanks for reading. I think 3D games CAN be done well, but definitely not on Unreal Engine. Unity is a better bet, someone could try something crazy like OpenMW or if they like sprite graphics then use GzDoom. I hope the Source 2 SDK also gets released soon. You can make games with S&box but Garry Newman wouldn't like porn games being made with his platform
