I'm halfway with you here. I delve into porn games looking for a decent story filled with full unafraid adult content. I do enjoy seeing corruption stories, I admit to enjoying following a girl, her family, the town slip into depravity. "NTR", "Female Protagonist", "Cheating" stories are the only ones you typically find willing to try to put the pretty female characters into multi- free use, or group situations. Unfortunately there is also a strong element in those stories of betrayal, turning the LI/FMC into an otherwise uselss and uninteresting 1-dimensional sextoy, and MC humiliation which I truly do not enjoy, and gets me right out of the audience for it. So I find myself looking, then rejecting alot of stories... or just putting up with it hoping for a teased revenge ending.
I really do not understand the motivation to create a cuck and spend months to years of your life writing and creating a VN or game about humiliating the helplessly handicapped cuck they created out of thin air. You can have a corruption of the FMC or LI story without having to castrate the MC. There are really not alot of creators seem to be interested in stories like that. So I'm still looking.
NTS stories address this directly, but frequently with another missing piece. They create then cuck the MC again (smh). In most of the VN/Games with NTS the MC is purposely made a Small to Mid, who then gets off watching his LI/FMC become a slut with his encouragement and permission, while he stays to the side jerking off. WTF?!?! I don't get that kink either. Once again, the creators seem to need to make the MC an observer to the action. What is this motivation to fabricate a wimp, make him the MC, and then lock him in a cage.
Harem game take this to the other extreme. Creating an Idealized MC who is a sex god that entangles numerous FMC/LIs into willing partners for him. But they they are chained to only the MC, as apparently porn games can't have adventurism for the LI/FMCs, only the Male MC gets any, and they go so far as to insure you see nobody else ever having funtimes, out of fear of the "NTR Haters", who seem to hate any porn that the MC is not personnally involved in. I guess the neighbor's wife doesn't get any unless your stud MC visits. There are more enjoyable stories within this genre then the others, but again, all one sided, but at least the MC is made to be involved.
What I would not give to find a story with multiple MCs, a couple or a family, who find themselves in an adventure and as they work their way through the obsticles set before them are forced to become corrupted into depravity to progress the unravelling the chains holding them back, and come out the other end victorious, bonded/committed, in love, and enthusiastically slutty. lol. Where the MCs enjoy and encourage eachother to enjoy and corrupt friends and randoms, but still return together to share their stories, and eachother with love and enthusiasm. Oh well.