the one I remember from the top of my head is "violated Heroine". The others I don't remember the name of, but the devs who made them are called "shoku" I believe. Something like that. They have like 5 or 6 games here on F95. Then there are some other games and devs too but I don't remember them right now.
But basically, under the sexual experience screen, you have a picture of her boobs/nipples/pussy etc. and at the start the pussy is very tight and has a hymen. but when you get raped a lot, the pussy gets more and more lose, over several stages. usually dcepending on the body count and dick sizes. so like (for example) after 1 body count you just lose the hymen but stay tight. after 20 your slightly loose. and after 50 its "average". after 100+ its loose. after 500 its ruined even more, and so on. at the end its a gaping hole. even the cervix is being opened up. For example in the shoku games this happens when you get raped by a huge orc, your pussy gets ruined. Or during an event where you get raped by an entire army for 3 days straight, I think over 2k people in total (you can see that in her total body count)
In violated heroine they take this system even a step further, and make NPCs react to it. Like if you're really tight, they will compliment you, or sometimes rape you even harder, trying to make your cunt gaping lose and humiliate you. if you're a prostitute the clients will pay you more because you feel better.
Meanwhile, if you have a ruined pussy people will laugh at you, pay you nothing, or even demand money for wasting their time. Their dialoge changes and they will say things like "I can't feel anything, your useless cunt is so loose my dick can't even touch the vaginal walls anymore" etc