DmD is the worst of it's genre, and I say that as someone who's played it through to it's current end point in spite of having a very poor opinion of its pacing and whatnot. However, when I say it's genre, I'm being even more specific, because DmD has a very specific set of mechanics, and the way it works can be found in other VN to a T.
Those VN are:
Babysitter: Same premise as DmD, only we have an Uncle and his Niece. One thing I like about this game is that the Uncle isn't a completely first person character. More importantly, the wring, particularly since they hired a new writer, has been excellent. Christine feels like an 18 year old girl, she has both the confidence of youth and the self consciousness of the sheltered girl she was, while also having a 12th grade level of intelligence. This is a refreshing change from D, who's understanding of the world shifted from elementary school level stupid on up to end of middle school at a Whim. Another thing I think Babysitter does wonderfully is Romantic Rivals. In DmD you have a few guys try to molest D, or otherwise trick their way into her pants. This is, ofc, a heightened level of reality that gets to the point of ridiculous. With Babysitter though, both of the Rivals, Mr. Silver, a known pervert, but a crafty man, and Robert, the cool drug dealing bartender from the local club are believable. Both, obviously, only see Christine as a conquest, making them perfect villains, and as long as you continue to show your own interest in Christine, both her safety and her affection, you'll never lose her to them.
Parental Love: This one is... I hesitate to call it a masterpiece, but if we are comparing it to DmD, it's the Mona Lisa, and DmD is a middle schooler's macaroni art. The main character is a father, separated from his children 16 years prior due to a drug addiction. He gets his life back together and even takes over his father's company, a restaurant chain, before coming back in contact with their mother, his wife. The game opens at a bar, the MC and the mother of his children meeting again for the first time in so many years. They talk a bit, reminisce and after some conversation, she decides she's ready to give you this chance. On your way back to her place you go to pick up your oldest daughter at the gym. Your first sight of her after these 16 years is as she's bent over in some workout routine, her ass on display... You know then 100% who this MC is, and how he's going to play, as if you didn't from the fact that it was an adult game. The game is a little over the top in the suspension of disbelief, but considering the girls would have been 2-3 and 4-5 respectively when you left, it's more than possible that the mental barriers we develop against incest would be missing. However, I can say this most importantly, even though its last update was only its .05, the daughter has given her daddy 1 more blowjob than D has, and it earned it just as well.
My Sweet Neighbors - I know it was mentioned above, but this was the first of the DmD clones I played when I first started. It's got no Incest but damn is it a good story, allowing you to begin dating your neighbor, a lovely older woman, before also giving you a nice romantic flirtation with her 18 year old daughter, as she explores her own feelings for you. It's got a bit of sexual content already and just got an update, which I haven't gotten the chance to play yet, but have already downloaded and am looking forward to.
a couple honourable mentions, that aren't DmD clones
I Love Daddy - this game flips the genre on it's head, playing as the daughter you seduce your father, and other hijynks ensue along the way. This game has 10 different endings, that's right endings, as it's complete, and each of them flesh out the backstory so much more giving you an amazing experience. It's one of my favorite games, absolutely recommend you try it.
Sisterly Lust - a VN harem game, almost like Parental Love in that respect, but with it's own mechanics making it a little different from your typical DmD clone. However, it's plot development, a day to day progression isn't all that different. You have 3 sisters, your mother, the little sister's 2 best friends, and a hot coworker to play with, and that's just so far... I may have missed a person or two, who are more optional. This game is fun, and the best part, is how the developer took basic character archetypes and gave them life. The shy innocent virgin, the tsundere older sister, and the affectionate little sister are character's we have all seen, but the way he writes their dialogue makes them feel real, gives them personality and individuality, in spite of their tropey origins.
I could recommend many more if you're interested in the future, but his should keep you busy for a few days.
