What if there was a game that played itself? All the NPCs went about their daily routines. Your in-game girlfriend sends you nekkid selfies (to your phone) while you're at work not even playing the game. Telling you that she misses you.
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You text her back telling her that she looks hot, and you can't wait to get home.
or you message her telling her that you have to work late, and she replies later with a pic of her dildo having all the fun you're missing out on.
Great games raise the bar.
Graphics don't matter as much as "action" if there's action, fans will forgive bad graphics.
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Every great game has an antagonist. Doesn't have to be NTR, the antagonist can be your own self-conscience. (Dating my Daughter) Big Brother had Eric. Eric wasn't a threat, his penis was smaller than the MC. You could choose to make Eric an ally, or an enemy, but the real enemy in the game was your self esteem.
Fans immerse themselves in a game. Like
@TCMS said, games are an escape from reality, temporarily. A chance to live vicariously through a game character. Football fanatics feel like they scored the TD, they feel like they are on the team, and they want their team to beat the antagonist. Football is the male version of romance novels.
A fantasy (not reality) like
@frap said "If I want sexy pictures and don't care about the story I might as well watch porn."
Realistic people isn't the goal, you can't compete with photorealism of real life, not without a huge budget. 2D and 3D games excel in the unreal... monsters, elves, super abilities that you can't do in real life. "In this game you can get a girlfriend"<not a game. anyone can do that IRL. futa girlfriend, yes. superhero girlfriend, yes plain old girlfriend, go watch porn
NTR and getting cucked may be someone's fantasy, but it's mostly someone's visual novel written about their life and what happened to them. Some people enjoy living other people's experiences, good or bad, whatever it is, is better than their pathetic real life, like people who cut themselves to feel something. Some enjoy the competition of NTR but hate when their team loses. Others like NTR because of authenticity, women are sluts as much as men, so there's a sense of realism in both sided cheating, as opposed to reality where men are called dogs, but women are secretly bitches. NTR is a niche, it will never make a great game in terms of number of fans. Players usually don't like to lose. A grindy game isn't going to win you game of the year either.
Fetish tags, are also niches. More people hate fetishes than there are people who like them, literally the definition of taboo.
Trying to be edgy and adding 10 fetishes will kill your game. The church is collapsing today, because religious leaders refuse to update their bibles. It was ok for King James to do a revised edition, but Bible v.3 is unacceptable. You are the Creator of your game, you are god over your game universe, not the fans. You can choose to be merciless, or forgiving. Stick with your vision of how your universe unfolds. If fans stop showing up, evolve, or destroy the universe, the choice is yours.