A downloadable h-game

This game is explicitly pornographic and contains nudity and sex.
It is intended for adults only.

All scenes are consensual, all characters are of adult age
(Nephelym are thousands of years old)


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Get the game on Steam:


Breeders of the Nephelym is an immersive, beautifully erotic 3D adventure game centered around catching and breeding the Nephelym, an enigmatic race of monster-human hybrids.

This game is entirely built by myself: DerelictHelmsman. It is currently in very early alpha, and there is a lot of work to do, but I am determined to see it through. However, this can only be done with your support.

Whether you simply download it and spread the word, or graciously become a patron, I sincerely appreciate your support. It is because of awesome patrons like you that it will continue on to become the most pleasure-inducing hentai game out there.

The public build is free, but you can gain access to content faster by becoming a patron.

This game never forgets that its primary objective is to present you with highly erotic pleasing material. It's a hentai game first, and an adventure game second. On that note, every Nephelym breeding combination will have its own two-phase (penetration and climax) sex animation. You can control when the climax happens.

There are a large variety of Nephelym, ranging from ripped and fit to fat and well-curved. All have been given "interesting" genitalia to make for unique breeding animations. There are currently a few known species, but more are certain to be discovered.
Lastly, any true breeder knows that to master the craft you need to "experience" your Nephelym for yourself. At any point you can breed with any of your Nephelym.

If you're feeling compassionate, you can give your love to a lustful blessed Nephelym and allow them to release their desires, or they might surprise you instead.

As the only one from the mythical human race, you can leverage this to become a Nephelym breeder. Catch wild Nephelym, breed them to produce offspring, and uncover satisfying sexual experiences with blessed Nephelym across the world. 
In addition to sex, you will find a deep lore and story behind this beautiful, but mysterious world.

Written from the ground up to be dynamic and editable in realtime, each character can change shape, color, details, and attachments on the fly.  All while sharing the same rig and animations.

Not only does this allow for robust custom breeder creation, but it also opens up many possibilities for changing the shape of your Nephelym through gameplay. For example, Nephelym can be fed certain items to make them fatter or more fit depending on your taste, this will visually change their bodies and alter their stats.

There are no loading screens at all, no annoying cutscenes, and the camera was programmed from the ground up to be a seamless smooth transition between every mode. Features were added to increase control over your breeder--you can at any time remove all or particular pieces of clothing. You have control over the different phases of any sex scene, and complete freedom with camera movement and speed.

To further immersion more, graphical beauty is a priority. Lighting is high quality and lots of foliage is used. I realize this comes with steeper hardware requirements than your average hentai game, so I have tried to optimize where possible, and it will be possible to scale down rendering quality if needed.

Further on the quest for highest quality hentai game, I licensed and forked a high quality (but now dead) fur plugin. I rebuilt large portions of it to better fit this game.

Development log


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wish i could prepay for when this game gets released. i love it so far.

Great work on creating this game, I'm loving it so far in alpha. 

I'm curious on up coming content you may be working on? Will there be more quests to do? More NPC? 

I would also think it would be cool to add, like whips and hardcore weapons, and maybe add areas that are hostile at first and you have to tame the area before you can start harvesting nephelym in that area, maybe have to beat a boss, then whip them into submission or beat it with a spiked dildo etc. 

Anyway, great game, look forward to seeing what's to come. 

Is steam version updated regularly or is there another version to install instead? 

Also sorry, can we donate to your project. 

Cheers. Keep up the good work. 

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So just looking at the character creation screen, I love the breadth of options, but I think it could be more user friendly. Perhaps having sliders instead of just numbers for adjusting size would be a good improvement, since that would make it easier to test out various options and really see what any one setting does. Also if it's possible, making it so changing gender between female and futa won't completely reset things if you're using one of the presets.

Also, I'd suggest making it possible to remove facial hair from male characters, if that wasn't already on your to-do list. 

Would totally be interested,  if it weren't only on Steam.  Like, why the hell would I want Adult games plastered on my library and for anyone to see I played or own one?   And I'm not about to log out and into steam just to go to "Private" steam accounts without friends.

Don't get me wrong though, I appreciate that such games can be obtained on Steam and I'm happy to see it encouraging "Adult Games" that are actual games and of decent quality instead of the constant RPG maker, visual novel, or flash games.  

Steam is just not great with boundaries.

Just run the game EXE, it has no drm, you just download it through steam.

That's something but still no, people are still able to look at your library.  Also wishing I could play this without Steam being involved.

Another option is to download it through Steam like you normally would, copy it somewhere else, uninstall the game through Steam, and remove it from your library.

i just downloaded the game on steam, when i tried to play it the game just closes


im eager to play but also not huge on  sharin my horny ass mood on main wth steam so thats a real shame 

Just run the game EXE, it has no drm, you just download it through steam.

Hello what kind of fetishes will be in the game / Will there be any foot fetish content? Side note: Is there a way to download it without steam?

Just run the game EXE, it has no drm, you just download it through steam.

Hello there. I am most likely not the first person to ask this question and also not the last, but I was wondering if there will be a m/m option is something you have in mind, or when we could expect its release. In any case, thank you for creating this fun game

Hey is there m/m content?

At first he said he would like in the link below. He pretty much gave his gay supporters the middle finger. He doesn't wanna do it now. https://forum.fenoxo.com/threads/breeders-of-the-nephelym.9505/ 

When I first launched, I thought I had to have M/M content to have any success, or even be allowed on Patreon. Keep in mind this is my first game and campaign on Patreon, and I have learned a lot.

Once it became clear that I didn't need to make M/M, I decided not to. It's not something I find appealing at all.

I do apologize for saying I would implement it at launch, but understand it was out of my own lack of experience and ignorance--not out of hatred for any sexual orientation or any attempt to mislead.

That is unfortunate, I really liked what I played. The world is beautiful and unique. I loved the character creation probably the best I have seen in a breeding game.  I would give it 10/10....I fell in love with the game... I wish there was m/m.  As a gay player, I wont be able to play but I Wish you the best of luck!

That sucks :( It looks interesting.

I found out about this game when he first started. Not having m/m really sucks. I was hoping one day we would at least get a little here and there but probably wont....

can we get crosspaly for mac...like mac never gets anything 

I plan to support Mac and Linux when possible.

thank yoooouu, hope its soon

Why don`t you buy a functional PC instead?

Updated link for public build 0.717.


Why can't I install/manage this with the Itch app?

It's hosted on MEGA, so you can't download it directly.  I wish we could manage it with the desktop app too. :(

Too big to upload here.


Great game! 


Are there any plans to be able to re-customize your character in the future without restarting?

Where do Titans spawn? I feel like I've searched the entire map, but havent found them

Do some monsters not have a male variant? I havent found any male Seraphim, Harpy, or Neko, and havent managed to breed any.

Some suggestions I have:

Maybe bump up the spawn rate of some of the males. It feels like the ration is 1 male for every 7 females

Include a map, and maybe have it say which areas a monster spawns in.

When breeding relatives, have a warning come up that they are relatives. 

Maybe include a walkthrough that tells where things spawn, and what combinations create hybrids

Almost all your questions are being answered in the official Wiki of this game. Also the dev is far more interested in futanari than males. Feel free to visit the Discord if you have further questions..

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I greatly prefer the female form. While not every race will have them, more males will be added later.

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Haven't played in AGES, but i loved what i saw before, so glad you finally brought it to itch, now i won't forget about you again!

EDIT: Played for a bit, and i'm having a really strange stutter, not sure if it's a common thing or no. Though just in case:

-Happens regardless of quality settings

-Every 1.5-2 seconds, occasionally up to 3 or 4

-Where I am doesn't seem to affect it

-Not noticing an actual drop in frames, from what i can tell, it just stops and if i'm moving my mouse(at all) it YEETS my camera around

Do you have any plans for a Mac version?