Subject: Jane is a 2D RPG Maker adventure by Natetheman223, built around a writing-focused demo with a subtle bimbofication angle. You play a goth college girl who becomes the test subject of an antagonist experimenting with bio-silicone, a silicone infused with nanobots meant to simplify implants. The game presents a sandbox-like structure where the captured protagonist is used in an uncontrolled trial, with 2D character graphics and RPG-style exploration.
The current build is v0.5, released December 17, 2025 for Windows, in English, and uncensored. The update adds more rooms, an improved intro with a tutorial explaining RPG Maker controls on different devices, new CGs replacing older sketches, more medipens, a redone lip system with additional variants, a new mirror option, and a larger presence for Nym-Foe in more rooms. It also changes confusing puzzles and adds a cat.
Developer's description
Welcome to Subject: Jane - a BE demo with a writing focus and subtle bimbofication angle.
Our antagonist has been experimenting with bio-silicone: silicone infused with nanobots to simplify the process of getting implants. What better "willing" subject to test it on, than a goth girl nabbed from college?
Informed consent? Controlled trials? Experts? All wastes of time and money - just pump the patient full of silicone and see what happens.
v0.5
Another batch of rooms, of course!
An improved intro sequence with a tutorial - the controls for RPGMaker are different depending on the device used, so I thought I'd cover that and try to make things more clear.
"Will we ever see that kidnapper girl from the intro again?"
Thanks to everyone's feedback, I made the boss fight harder.
I lied, it's easier now (hopefully)
Several new CGs - some are brand new; others to replace older sketches
More medipens...
...and a LOT more bust sizes...
...and a completely redone lip system with far more variants!
A new option at mirrors!
Increased Nym-Foe's general presence by adding her to more rooms.
Changed a few puzzles that were resulting in confusion due to being poorly made
...a cat?
Unshackled growth no longer has any requirements other than completing the game. If you'd rather grind than collect medipens, go nuts.
v0.4.1
Your complaints about the boss fight have been heard.
With this update, if you spend too long in the arena (60-80 seconds), and you haven't ever defeated her before, you are given an optional hint. And if that's not enough, there's a little bit more to it... but I'm sure you'll be alright.
Some other small changes have been made around the lab as well. A Ko-fi link has been added to the computer, too.
v0.4 is here!
So what all are we looking at? What did you wait 4 months for?
Several new rooms (new batch of puzzle rooms, new rest room, many new side rooms)!
Numerous more dynamic CGs (and a gallery to view them)!
Another medipen...
But don't be fooled, this isn't just a little 900cc boost. It's
much
more.
An intro sequence!
More customization regarding Jane's individual sizes.
Added a certain gal that's been patiently waiting to enter the show since release...
Fixed some bugs present in 0.3.2
Removed Herobrine.
v0.3.1
added a joke in room 17
made room 16 less tedious
slightly adjusted Jane map sprite
changed the way the product key works so it's less likely to not work
some small bug fixes
Version 0.3
is here! So what's new?
Well, the big thing is that there's a boatload of new portraits - Jane's imagery has been completely overhauled. You can change the options regarding her appearance at (almost) any mirror. You can even use the old portraits if you so wish.
On the note of mirrors, you may want to check the... ominous one. It's a bit different than last time.
She also has a new map sprite! It's one specifically made for the game - no more default RPGMaker sprite (though, you can still use it if you want to).
There are a number of new rooms, and an extra max size upgrade, oh boy!
Something interesting sometimes happens when you overfill, too.
And, of course, tons of bug fixes and subtle QoL adjustments to the game!
v0.2.6
Bugfixes
v0.2.5
This is a significant update!
Two parts of the code have been made easier to find - one of them was in a super hidden room that only a dev note hinted at, and the other was just a little too far off-screen.
Player reviews
Player rating5.0 / 5 · 4 ratings
Written reviews4 · avg 4.8★
Positive (4–5★)100%
Latest review2026-03-31
What players say
With three five-star and one four-star, players mostly praise its body-expansion art and short puzzle play.
5★3
4★1
3★0
2★0
1★0
Players like
Body-expansion art and character drawings are appealing
Clear BE/Bimbofication focus appeals to fans
Puzzle gameplay is short and not braindead
Common complaints
Feels barebones and very short
Lacks internal monologue and carryover effects
Best for players who enjoy breast and hip expansion in short RPG Maker games
Summarised from 4 written player reviews.
HollowN2026-03-31★★★★★
While I would absolutely love some penetration to be added to the game, the BE in it is top notch. That being said, the lips do get a little silly after like 8k ccs. Also, I don't really like the…
rocky_gamr2025-06-23★★★★★
This game is pretty nice, it's clear the dev got inspiration from lacto expansion and it shows! The drawings for our girl Jane look pretty great , although it's pretty barebones atm, but i'm sure that in the near future…
rontremalo2025-06-22★★★★★
Hot af. Edged solidly for about an hour. The music was never obnoxious. You were prevented from growing too large immediately, so you had to quest around for the medipens. The art was perfectly adequate. The puzzles weren't that bad…