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Unity
Mayfly v0.3 Reset
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Mayfly is a adult sci-fi game developed by JasonTon, built with the Ren'Py engine. It was first released in December 2022 and last updated in August 2026. The game runs on Windows, Linux, Mac, Android and is available in English, Russian,Chinese (Traditional), Chinese (Simplified).
Overview
"I eneath the streets of this city, the smell of blood and rust lingers. Portraits of the powerful hang everywhere, trying to cover up their crimes."
Devon. The world's only mega-city. A place where splendor and squalor, order and chaos… every contradiction lives side by side. You might find gold on every corner, but don't ignore the corpses it's piled upon.
Superpowers touch only a few, and most of them use that power for selfish gain. The government, at its wits' end, had to let private corporations handle security, giving rise to all sorts of "vigilantes." Not all of them are out for justice. You'll need to watch carefully… Yeah, the only person you can trust is yourself.
The government didn't give up control entirely. They formed a secret police force of superhumans called the "Bounty Hunters." They're the more vicious, more powerful claws of the state.
What will you choose? To drown in this dazzling city of sin, or… to become a dying lamp lighting the way forward? It's tough. Your companions have their own ideas too. Maybe every choice you make with them will twist the world's fate.
"Will you live a mayfly's brief life in this gilded metropolis, or carve an eternal legend into the streets?"
"After all the suffering, is what awaits you truly light and warmth?"
Superpowers touch only a few, and most of them use that power for selfish gain. The government, at its wits' end, had to let private corporations handle security, giving rise to all sorts of "vigilantes." Not all of them are out for justice. You'll need to watch carefully… Yeah, the only person you can trust is yourself.
The government didn't give up control entirely. They formed a secret police force of superhumans called the "Bounty Hunters." They're the more vicious, more powerful claws of the state.
What will you choose? To drown in this dazzling city of sin, or… to become a dying lamp lighting the way forward? It's tough. Your companions have their own ideas too. Maybe every choice you make with them will twist the world's fate.
"Will you live a mayfly's brief life in this gilded metropolis, or carve an eternal legend into the streets?"
"After all the suffering, is what awaits you truly light and warmth?"
Features
Mayfly features themes and elements such as romance, sci-fi, superpowers, teasing, vaginal sex, 3dcg, ahegao and animated.
Frequently Asked Questions
Is Mayfly free to download?
Yes. Mayfly is free to download, with links to the available builds listed on this page.
What engine is Mayfly built on?
Mayfly is built with the Ren'Py engine.
What platforms does Mayfly support?
Mayfly is available for Windows, Linux, Mac, Android.
What language is Mayfly in?
Mayfly is available in English, Russian,Chinese (Traditional), Chinese (Simplified).
Screenshots
Download Links
These links lead to external hosting providers. Use at your own risk.
Developer Notes
All the characters depicted in this game are fictional and over the legal age of 18. It doesn't include any illegal or forbidden content according to the Patreon TOS.
Warning!This game is forbidden to be distributed in any country/region where erotic visual novel games are considered illegal, and any uploading of this game in such countries/regions is not the intention of the author. I will never upload this work in such countries/regions.
Changelog
v0.3 Reset
1500+ New renders (+60%)
35+ New animations (+150%)
5500+ New story text lines (+83%)
10000+ New lines of code
20+ New music tracks
50+ New sound effects
New ending theme song
Brand new render effects created
Richer facial expressions for characters
New terminal system added
New "Characters" feature system added
New wallpaper system added
New chat system added
Gallery system updated
Character system updated
v0.2 Reset
1135+ New Renders
14 new animated CGs
3100+ entirely new lines of story text
6850+ entirely new lines of code
30+ new music tracks
100+ new sound effects
New end credits scene
The rendering quality has been significantly enhanced
Added Volumetric Light/Volumetric Fog
Higher-polygon models and new skeletal rigs have been added to the characters, allowing for more refined and detailed body movements
The MC's model and skin have been updated, making him look... more handsome, perhaps?
Significant optimizations have been made to the transitions and sound effects in version 0.1, with a revision rate of over 70%
A cheat document has been added... Open it, and it will guide you on which choices to make
v0.1 Reset
1050+ brand new renderings
27+ new animated CGs
3500+ entirely new lines of story text
7300+ entirely new lines of code
40+ new music tracks
300+ new sound effects
- Language: Russian
New interface and UI
New rendering effects
New end credits scene
Added affection menu
Added gallery
New characters + relationships + storylines
v0.2
1028+ New render.
20+ New Animation
4700+ New code
27+ New game soundtrack
84+ New game sound effects
Added a new English translation (thanks to Ozpoz)
New visual effects (light and shadow, materials, character states)
New main game page (dynamic)
New end credits acknowledgement
Changed many unsuitable UI effects
Fixed display error in the English font, now with better visual effects.
Warning!
0.1 archives will no longer be available in version 0.2, this is not a bug.
Because the game is defaulted to English, it will be reset to English when you switch to another language to read the archive. This is not a bug.
v0.1.1
In this update I have made English the default language and fixed some text errors.
Android's main menu display bug fix.
v0.1
Pictures: 750
Code: 4750 lines
Music/sfx: 23/52
Animation: 29 segments
Language: English, Chinese (Traditional), Chinese (Simplified)
More links may be in the source thread (registration required).
Source Thread
