Gravenous Glutton
This simulation game is designed based on the philosophy that a belly fetish game needs to provide more sexiness than it gets from its visuals alone. I believe it can be done through good systems design. Specifically, I want to narrow down on what I see as the key elements of this game's two main fetishes: for stuffing, it is the concept of pushing past limits, and for pregnancy, it is the anticipation of growth. Each game mechanic is designed to interact symbiotically with the others in a way that both makes logical sense and hopefully pushes your buttons in a way that many games of this genre don't.
Goonable mechanics implemented in this game include:
-Intestine capacity AND stomach capacity
-Upgrade capacity through stretching
-Visible shifting of the belly as contents flow into the lower areas
-Long-term growth that requires meeting the caloric demands of pregnancy
-Impregnation minigame, designed with inspiration from real-life systems that may be familiar to you. Press Enter on PC to skip
-Up to 3 in the womb depending on your minigame performance
-Fetal movements
-Belly touching and jiggling, with noises and hiccups
-Birth sequence (non-explicit)
-Ability to surpass your limits temporarily by fasting
-Munchies, in case that's not enough for you
-Hidden achievements that unlock upgrades
-Stuff your belly on livestream to earn money based on how much food you eat and how much bigger you get
-Spend money on medications with effects like instant digestion, increased hunger, restoring missed growth, and 1 unlockable secret
-Local saves (only working on PC and Android). Autosaves at the start of each hour
-Worryingly detailed descriptive text
Not implemented, but planned:
-Ability to start a new game without wiping your old savefile
-Breast expansion and minor weight gain, which may be difficult but I'm looking into it
-Even more worryingly detailed descriptive text
This game isn't hard, but you should be!
voice by katagiri aki (RJ01078386)
lewd SFX by Shinlala (link)
| Status | In development |
| Platforms | HTML5, Windows, Android |
| Rating | Rated 4.5 out of 5 stars (65 total ratings) |
| Author | baconfry4545 |
| Genre | Simulation |
| Made with | Unity |
| Tags | Adult, belly, Erotic, pregnancy, stuffing |
| Average session | A few minutes |
| Languages | English |
| Inputs | Mouse, Touchscreen |
| Accessibility | One button |
Install instructions
Unzip the downloaded folder and run the executable Gravenous Glutton.exe. Fullscreen mode: ALT+ENTER
json savefile located at C:\Users\YourName\AppData\LocalLow\DefaultCompany\Gravenous Glutton\savedGame.json
if the game freezes on startup when trying to load your save, check for the updated version
Development log
- updates on pause for November (game jam!!)54 days ago
- content expansion + local save support74 days ago
- Growing pains + seeking feedback on new content77 days ago
- Postpartum updates79 days ago

Comments
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I love your game. If you ever add more content, that would be awesome. Once you know how to unlock everything, you can get the trophies on your first try. Keep it up!
Hey I love the game! However I have a question regarding the mechanic. Is it possible to get unnaturaly huge bellies in the editor with plugins? If yes do you know any good plugins
Pregnancy+ plugin is already bundled into the BetterRepack version that basically every Koikatsu user is already using. yes you can make the belly bigger than what I have in the game, but as you said yourself, it looks unnatural
Unnatural is what we want! Lmao
Hey baconfry!
I know you're busy with the Gamejam, so please come back to this later, but I wanted to say how good this game is! I'm not a fan of stuffing, normally, but the anticipation and the progression is top notch, exactly like you stated in your goals in the first paragraph.
Everyone is clamoring to request more content in terms of bigger sizes, more babies, breast growth, etc, but I completely understand that it is out of the scope of the game and gets to the point where making a sequel might be better/easier to accommodate those things.
I'm going to clamor for content of a different type: Reactions. More text reactions of what the girl feels, her anticipation of growth, her struggle on stream and off, reactions during stream (maybe actions during stream that are purely text based? Maybe descriptions of masturbation/toys [at least when she's small enough to manage it, part of the progression would be how stream actions change as she gets bigger], orgasming on stream, maybe a random event where a stream viewer 'donates' a big food item [basically a hamburger twice as big as normal], stream roleplay about pregnancy and pretending there are more babies than there really are). You can even fake some of the requests by giving text descriptions of the character's body every few nights (describing weight gain, breast growth, squirming uncomfortably at night, being pinned beneath a huge belly, maybe the character thinking about her impending birth).
Maybe a short intro would be nice too: did the girl get pregnant on purpose? Was she planning on becoming a bloated whale, or did her latent desires to mukbang streaming lead her there unintentionally?
I said above that I'm sympathetic to how hard it is to add animations and bigger sizes, but I have an idea that might be more rewarding and easier to achieve than just 'bigger belly'. I think this game could benefit from a finale- just a cut away at max size (maybe achieved by purchasing a $5000 medication to delay labor or whatever seems appropriate) where you can show the character in a special render in different clothes, different pose at her final size, not having to worry about growth animations or how the old clothes fit. Bonus points if the animation shows breathing, kicks, stomach rumbles, and contractions- and give the player a chance to poke her belly, breasts, and keep feeding her (no mechanical effect, just an animation) as a reward. This would help with the problem of getting new sizes to fit with the current rig since I'm thinking a separate special final scene, and give a statement to the player "This. This is the maximum size, this is the culmination." A fade to black, description that the character is taking a break from stuffing, and buttons to get pregnant again (from scratch) or get very pregnant (keep money and unlocks).
Good luck on the game jam, and great job on an excellent belly expansion game!
Excellent ideas and feedback! More size is good, but given just how big things already get, all the other touches you mention would have more impact. I would be so so happy if baconfry did these!
Yeah, yeah, this are awsome ideas!
alr i maxed out everything theres nothing New the final size IS the final Size even with 6 babies
this game is really good. waiting for an update...
I'm not sure I understand the starting minigame, could you add a tutorial ? Secondlyn, the volumes feel a bit off, aren't the values a little smaller than the visuals ? Lastly, you mentioned milking and breast growth in other comments.
When would you say that would be added ? How about weight gain ?
there is no tutorial for the starting minigame because the reward for figuring it out is getting triplets. if i told you the exact mechanics, the reward wouldn't mean anything
the volumes are scaled so that the belly stages are spaced equally between a flat belly and the largest belly I can achieve with my modeling program, with later stages being spaced a bit further. there is no IRL reference of what a belly filled with more than 4L of food looks like on a slender girl so i have to just wing it. There may be just as many people who think the volumes are too low as there are who feel like the volumes are too high, so I will need more opinions on this before I take action
breast growth depends on whether modding can fix a distortion issue with larger breasts on a huge belly. i do not know of any existing mod that fixes this. I can try to join a koikatsu modding server and ask for advice, but nothing is guaranteed. I do want this though
weight gain that significantly changes the shape of the body is not supported by koikatsu at all (and I am not personally into that), so the most that you can expect is a sort of baseline minimum of tummy volume that affects the tummy only. I would say to not get your hopes up if weight gain is what you want. (the project is not tagged weight-gain and is not advertised as such)
also, development of this game is on pause while I work on a different belly-related project for this month, check the devlog for more details
not really that hard just tap 3 times and wait
is there a discord we can join for progress?
I think breast growth and milking would also be entertaining
I think so too, but I gotta solve this problem first
ah understood good luck, I don’t think a little model clipping is to bad just don’t want it to be excessive, I also thought maybe some options like taking clothes off like bra and underwear would be attractive and more interactions for touching different parts like her head or her chest or lower regions and maybe options for sexual content like having her masterbate on stream but maybe that’s not quite the direction you’re thinking, I’m just spit balling ideas I had while playing the game, like adding buyable sexual toys, I think it might be nice to just have more stuff to do with the money period because a lot of the purchases are temporary upgrade and there isn’t really any incentive to keep streaming once you’ve gotten a certain amount, over all I really love this game and can’t wait to see what you add in the future
Good luck with this, Koikatsu body models and textures definitely weren't made with this in mind, let alone clothing lol.
Are you playing with the posing at all in Studio or are you just relying on existing idle animations? Some quick adjustments on hand placement with IK / FK would help avoid clipping on the cuffs at least, although you may have to make the hands grip the jacket instead of resting like that to get anything that looks natural.
So good, please update more systems like breasts grow and milking, also please increase the maximum amount of babies can get pregnant in once. 號
Hi! Question! Will there be a new belly size and will we be able implant more eggs than just six? Also, I am having a hard time obtaining the trophy "Take that, triple threat", as I think it's related to conceiving triplets naturally.
Do you have any suggestions as to how I can accomplish that? So far, I have only been able to get twins. Any suggestions with this will help.
Also, I do have a suggestion as to what would make this possibility more interesting. My suggestion is this, a counter to track all the pregnancies and how many they have had at the current game point.
The current belly sizes are pretty much the limit of what the pregnancy+ mod in koikatsu is capable of, so I don't think I can go beyond that
you can add more than 6 eggs by editing the save game file directly. I did not add official support for that because the game is really, really not designed for you to have that many
the achievement can be obtained quite easily if you figure out exactly what the game is doing whenever the blue bar completes a cycle
Oh, okay. Will you be willing to experiment with attempting to make the belly size larger? If you want, I can look up the mod to see if it's even possible? Also, I am having a hard time trying to find that save file. I read in the comments that the save file system isn't implemented yet.
Plus, I figured the blue bar has something to do with it. I am going to have to experiment!
it technically is possible to make the belly larger, but at that point it no longer looks like it belongs to the girl's body and I don't find that sexy to be honest
save files are implemented but only on the PC and android version, and i don't think you can edit them on android
i'll give you another hint: in real life, if you thrust as fast as you possibly can, your partner would probably say that you have bad technique
So, it actually can go larger? Can I talk you into implementing one more size? The size can only be accessed when you have a total of six inside the womb! Then, after you have contractions and are no longer pregnant. You unlock a trophy that allows you to access that size whenever you want! Pleeeaaaassseeeee!!!!!!!!!!!
Also, think I know what you mean by your hint.... I might break my mouse if I do.
This is a very interesting game. Way more entertaining than I originally thought. I'll be keeping a close eye on the progress of this game as a whole. Very well done
posting this as a comment because the latest update contained nerfs and I want to be transparent. I do think that these changes are necessary because it doesn't feel good when you can still eat but you're already at max size, and it makes it more realistic, in a good way I think
scaling has been adjusted so that you need to eat more to reach higher size.
pregnancy has been adjusted with a fixed volume added to each pregnancy regardless of multiples count. this results in significantly larger single pregnancy, with less impact on higher multiples. womb capacity bar has been scaled back by 1/2. this means that up to 6 fetuses could fit on the UI, if such a thing were possible
the adjustment of size requirements means it is more difficult to earn money from streaming overall; some values have been adjusted to compensate (it is likely that more will be needed, probably reduce enzyme cost at least)
this also means that some achievements related to reaching a certain maximum are now more difficult
how do you get all of the achievents. ive got most of them but not all
I believe one can only be gotten by getting triplets naturally. But I'm not sure though. I'm missing that one myself.
is weight gain something youd ever consider adding to the game
I do enjoy a bit of softness, but i'm not into anything chubbier than bready from nikke, if that's what you're asking
WG would also be lower priority than breast size increase, and both would require significant work on the image editing side of things. it's not a hard no, but consider it a stretch goal
My Window Defender blocked the game download...
Here's the image:
This is a known issue with any exe file that isn't digitally signed, and it costs money to digitally sign a program so we're just going to have to deal with this.
Though looking through your history, it seems like you experience this a lot. Maybe you should look into your Windows Defender settings to see that you haven't set it to be more aggressive than it should be
Web version seems to be broken at the moment. EDIT: Also seems like the PC download is now missing. I can only see the android one
i was updating lol sorry
No problem. I wasn't sure if you would know or not so it seemed best to mention it just in case.
Nice, you added the sound and camera buttons. How do you use them? Do they become available when you are about to finish the pregnancy cycle?
I only added them to make sure they looked fine on the UI. functionality will be added later. if i were a professional, i would have disabled them before I hit build, lol
awebo, i thought they were already working, i was already speedrunning the game to see the new mechanics xD
i have some of the achivements but i have no clue what they do😂
gimme like 20 minutes, i updated it so you can finally view them all, just gonna add a few more SFX and i'll upload
thats great thank you
more babies to make her bigger and weight gain to make her thicc and bigger breasts.
I didn't design the game around having more than 3, but sure, when I add support for local saves, feel free to edit the JSON file and give her as many babies as you like
Can you make a mode where after you finish once there is some kind of endless option
After giving birth, you get to do the impregnation minigame again, if that's what you're asking? Unless you are asking for a pregnancy that never ends, which I think I will not be doing
The game is on the right track, very good despite being just the beginning. Keep it up, this game is going to be glorious.
By the way, do you have a Discord server?
Another thing, there were 9 achievements, right?
discord server not up yet, I need to research the logistics of running one
there are 9 achievements, I accidentally made one of them unobtainable last patch. just fixed it but it will apply to webGL only until i get back from work
I'm 90% sure I understand the opening minigame, but I still can barely meet the threshold for twins, forget about triplets. The blue bar needs to move about half as fast - near endgame it's just luck-based.
That gripe aside, I love where the game is going!
EDIT: NEVERMIND, I was wrong! Blue bar timing doesn't matter AT ALL!
Congrats on the triplets!!!
I tried to install the Android version and it says it's not compatible with my device
yeah, sorry, I get that on my device too but then I close the notification and the game runs flawlessly after that
But my device won't install it at all due to said not being compatible
I will have a look later today to see if Unity has more up-to-date android development tools.
What type of device are you using?
Xiaomi 14T Pro
ok i tweaked a few settings and I don't get that warning on my device anymore. let me know if the issue is fixed
Are there plans for a PC download so we can save progress?
what are all the achievements?
Is there a way to get hints for the achievements?
And a way to track which ones you have? I've managed a few now.
I think it will ruin the fun if I tell you exactly what you need to do to unlock each one, but as a compromise I will reveal the names of all the achievements. This can be your hint.
As of 10/16/25, the achievements are:
(affect gameplay)
-Eater of Worlds
-No Lunch Break
-Miss Piggy
-Mucho Texto
(cosmetic)
-Take That, Triple Finish
(no effect on gameplay currently)
-Opening Kickoff
-The Morning After
-Elastigirl
-That's No Moon
What about the tiniest of hints for mucho texto like maybe the vaguest of descriptions of the requirements
It's called that because it's unlocked at the very moment you see the greatest (and largest) masterpiece of writing I wrote for this game
"This simulation game is intended to scratch an itch that other games don't reach with their limited systems design. Pregnancy games often boil down to spamming a time-skip button or walking back and forth to get bigger, and stuffing games often neglect the fact that there's more to digestion than just a stomach."
so to change that you made it so now you have to press two buttons?
There's actually 3 buttons! 4, if you count belly buttons (and that one can be pressed too)
If you have a suggestion for more buttons, please let me know and I will try to work something out.
a simple way would be to add stuff beyond „eat food” and „wait” button, cuz the gameplay devolves into spamming the first one untill you can’t and then you click the second one
Maybe having to do a job to earn money to earn food?
One concept that I have sitting on my drawing board is doing mukbang streams to earn money by stuffing yourself in front of a live audience. The reason it's still on the drawing board is that I don't know what the player should be able to DO with money. Using money to limit the player's ability to eat makes it a lot less fappable because eating until you can't eat anymore is the entire point. The infinite burger button will stay.
So if we want to expand gameplay a bit more, here's the route I'm thinking of:
1. Implement a money system, and add/balance belly stuffing livestreams as an income source. I'm thinking that income should scale exponentially based on how many times your belly increases in size, and the stream ends automatically if you have to go to the toilet
2. Keep the infinite food button, and allow the player to spend money on premium supplements that are taken with a separate button
3. Figure out what benefit the premium supplements should offer
options might include things like:
-gastrin - immediately converts a lot of the stomach bar into intestines (cheap)
-motilin - immediately converts some of the intestine bar into calories (relatively cheap)
-folate - gives babies the equivalent of 1 day of growth (expensive)
-ghrelin - makes you hungry without having to wait (expensive if 3x, cheap if 0.2x)
-caffeine - sleep at 2:00 instead of 0:00 (cheap)
somehow, it looks like i have my roadmap
i love it
Definitely promising. I will say that getting triplets seems too difficult - I tried probably a dozen or so times and despite getting very close, it seems like you need a perfect minigame and at the higher speeds the frame overdraw makes it extremely difficult to actually click on the correct frame.
Other than that, what's here isn't bad. I like the delineation between stomach and intestinal stuffing, that's a touch that most other projects don't take.
Here is a hint: when I said the minigame was based on that, I meant what I said. Perhaps you are finishing too quickly?
Can you improve pregnancy and childbirth in future releases?، I love it ❤️ 🔥
Hey, I've got a question. When the womb bar is finally full does the size just reset or is there a special birth animation?
Birth is not something I have the means to properly animate with the tools I have. Sorry! I can at least work on changing her facial expression at least, and I can probably whip up some kind of belly shrinking sequence with the images that I have. I don't know if that's good enough but it's the best I can do for now
All good! I was just wondering. I'd like to see what you come up with
Could I give some suggestions for something I think would be fun?
there's no need to ask for permission, just give the suggestions
Maybe the actual birth could be a minigame where you have to push in time with contractions. Instead of the usual model for the girl it could be a closeup of the birth, and if you miss a push prompt you lose some progress and you see the head go back in. And once the baby has crowned it's a sort of "checkpoint" in the birth where the progress can't completely restart as you push out the body
With the software I'm using, I don't have any way to make it look like a baby is coming out of her. I don't have an image of a baby that looks like it's made from the same material, and I can't edit her to have a widened birth canal. If I draw a separate image to depict the birth and don't match the model's artstyle flawlessly, it kinda makes you think "hey wait a minute that's not really her" and that sucks. I don't have the means to do justice to the miracle of birth. Sorry!
There's always other games for birth scenes! Hazumi has it, and Liz Tower Breeding Mod has a lot of it. I recommend both
Is the minigame's speed tied to the game's framerate? I was having a hell of a time with this on a high refresh rate monitor.
Oops, good catch! Looks like I forgot to use Time.deltaTime in the clumsy prototype I made a year ago that I just pasted in. You saved me a lot of time. Let me know if it's still an issue in the latest version.
Seems better! Attempting to get triplets might actually be possible now, haha. Thanks!
I really went into this with high hopes because of your boasting, and I'm (not) sorry to say that I'm very disappointed.
There's no explanation of what anything does. (and no, a vague page description doesn't count.
Progression is painfully slow.
"Descriptive text" is just a lie, there's never a single word on screen.
Finally. There's not even a menu! No windowed screen option and no "X"
I understand that this is likely your first game, but you could have done all this a lot better.
I don't mind receiving criticism, but I DO mind when people say things that are not true. If you claim that there's never a single word on screen, then I don't think you played the same game that I uploaded.
I find it odd that you say progression is "painfully slow", because if you're stuck on the text-free impregnation minigame like your statement implies, there should be *no progression at all*.
However, if you actually got to the main gameplay loop (and you were just lying when you said there was never a word on screen) then sure, you could say that pregnancy progression is slow. This may be frustrating if you're only here for preg content, but please understand that I can't just hand you the maximum possible size on day 0. In fact, the animation that plays when you finish the sex minigame is meant to TEASE you with a preview of what her final (empty) pregnant belly will eventually look like. My personal belief is that pregnancy deserves to be waited for. This is by design.
The lack of an X button and menu, ok that's fair. I'll work on that today.
An earlier release was mostly black screen when downloaded, seems to be fixed now.
I'd like to ask you sincerely, is there anything I could have done to change your opinion of this game? I don't believe I've done anything to deserve this level of hatred
Simple but enjoyable. I'm excited to see what updates or new projects will bring
For what there is it's surprisingly really enjoyable. I could honestly see this being a full fledged management type game with enough additions
I'm not seeing any text or icons, just three progress bars in a black void with the character to the right.
click anywhere to continue~
i am not going to explain how the minigame works. your reward for figuring it out yourself is triplets
Downloadable version please?
ask and ye shall receive
There are no buttons to increase the Preg (Which is also not really explained how you do that, we could use some tooltips on how things work.)
The game play loop boils down to pressing the weed button every morning and then waiting untill hunger hits 3.2x and eating untill you max out the bar as much as you can.
Sometimes you shove a couple burgers in early to avoid the stomach and intestines bar, but other than that, you just repeat the same loop.
As a Hyper Preg lover, I'd love to see it also added to this, but I don't really see that fixing any of the problems I have with this.
As a Proof of Concept, this is fantastic.
As a game? It really needs some work.
Thanks for the experience!
Thank you for the feedback!
There's no button to increase the preg in real life, either!! Just let your body take care of that. (growth occurs at 4AM and is halved if you didn't meet calorie requirements, 2000/day, after 20 days add 400/day per baby)
The weed button is actually an inventory that goes up to 5, make of that information what you will
I am considering going up to triplets, but that (and twins) will probably come with a penalty to how much you can stretch your stomach by overfilling it
I will add the suggestion for tooltips to the list~
There is also not an impregnation minigame that determines fertility in real life either though.
And calorie requirement is never a shown mechanic in the game.
Thanks for letting me know!
I wasn't particaruily aware of the want for realism, but nice touch I suppose~
Though I'm spefically into Hyper-Preg, soooooooo, Ye.
Anywhore, nice to see how you've updated the game BTW.