Breeders of the Nephelym
Early access since Oct 2019
Enter an immersive beautifully erotic 3D adventure centered around catching and breeding the Nephelym, an enigmatic race of monster-human hybrids with an overwhelming desire to mate.
89% positive · 10K reviews
Not yet
In early access, still in active development
Medium confidence
Active Development
Not yet
In early access, still in active development
Medium confidence
Active Development
Where to get it
Free on Steam
Evaluation
Breeders of the Nephelym has been in Steam Early Access since October 18, 2019, and remains there today. Development continues at an irregular pace. On February 12, 2024, the developer acknowledged a slowdown due to personal real-life issues but explicitly confirmed the game is not dead. The most recent public Steam build (0.761.7) was posted on June 13, 2025, adding a Breeder's Log system, additional graphics options, and bug fixes. The developer also maintains Patreon and SubscribeStar channels where intermediate builds are released ahead of public Steam posts, indicating ongoing activity beyond what appears on Steam alone. No 1.0 release date, completion roadmap, or statement that development is wrapping up has been made. As of October 8, 2026, the last public Steam post was June 13, 2025 — approximately 16 months ago — which is longer than ideal, but the developer's history shows irregular gaps between public posts while work continues on Patreon. The game remains in active development with no signal of conclusion.
Evidence
Public build 0.761.7 released with new Breeder's Log feature, additional graphics options, Lovense system optimization, and bug fixes. Several intermediate Patreon builds preceded this public release.
Developer explicitly stated the game is not dead, but development has slowed due to real-life issues. New features and bug fixes included in build 0.761.
Details
Developer
Publisher
DerelictHelmsman
Achievements
—
Platform
Windows
Controller
—
Steam Deck
Playable
Players
Single-player
About this game
Enter an immersive beautifully erotic 3D adventure centered around catching and breeding the Nephelym, an enigmatic race of monster-human hybrids with an overwhelming desire to mate.
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 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, graphical beauty is a priority. Lighting is high quality and lots of foliage is used with many characters having dynamic realtime fur.
Hentai First: Breeding System
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.
Ultimate Sex Adventure
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.
Dynamic Characters
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 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.
Immersion
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, graphical beauty is a priority. Lighting is high quality and lots of foliage is used with many characters having dynamic realtime fur.
Are these done yet?
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Last evaluated Oct 8, 2026
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