There are some porn games that are considered very fun and even influential on the larger games industry, particularly coming out of Japan such as Rance[0], a grand strategy series that's run for over 30 years.

[0]: https://en.wikipedia.org/wiki/Rance_(series)

I wonder if there are any prn games where the gameplay is so good you forget about the prn

The Fate series which later spawned a massive franchise (multiple games, movies and books) started off as an eroge.

It doesn't have a whole lot more sex than your average fantasy novel, and like your average fantasy novel it's also an extremely long retelling of the author's tabletop game.

(Fate somehow has exactly the same magic system as White Wolf Mage even though it's too old to have copied it. Not sure how that happened.)

>It doesn't have a whole lot more sex than your average fantasy novel

The all-ages versions of Fate also remove all of the sex with minimal effect on the story.

> Fate somehow has exactly the same magic system as White Wolf Mage even though it's too old to have copied it.

Unless there’s a different Fate that also started of as eroge and spawned a massive franchise, it was first released in 2006, 13 years after White Wolf first released Mage: The Ascension, and so was very much not too early to have copied from Mage.

The setting was written in 1996 with Mahoutsukai no Yoru/Kara no Kyoukai.

Also the other half of the setting is all about vampires, and it's definitely kind of like White Wolf Vampire, but not close enough to look intentional.

> The setting was written in 1996 with Mahoutsukai no Yoru/Kara no Kyoukai.

Still three years after Mage was published.

Not in Japanese though.

Wait, Kara no Kyoukai and Fate are set in the same universe?

Sort of, the setting is the same but none of the series are actually in continuity with each other. Even Fate/Zero isn’t actually the same universe as Fate.

If they did that it’d restrict the story too much - Nasu loves setting rules about how the magic stuff works, but he only does it so he can break them later to make someone look cool. That’s why he’s the world’s best fantasy writer.

The Melty Blood fighting game series is a spinoff of an adult visual novel as well