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January 2, 2026

Dev Build - Tummy Trouble

Happy new year everyone! Sorry this update took so long, but it wound up being a lot harder to implement this than I thought.

There is a new belly growth path in the weight class menu. You can grow into it by pressing the "Chubby (Belly)" button after unlocking the first weight class. You can still access the wide, long, tall, and round growth paths by clicking the "Chubby" button. You can also skip straight to the max belly weight class by pressing the Belly button in the Skip to Blob Shapes section. I still want to redesign how the weight class system works to make it a smoother experience, but that would be a big undertaking that was out of scope for this update.

I had to bend a lot of systems to handle the belly growth, which caused a ton of bugs. I think I have most of them sorted out, but let me know if you run into any weirdness. I wouldn't be surprised if I missed a couple fringe cases.

Speaking of bugs, there's a known issue where the belly can twist or shrink into itself a bit in the hyper obese stage. I think this happens to some extent with every body type in the hyper obese stage, but it is much more pronounced with the belly. I spent a lot of time trying to fix this, but I haven't found the exact cause yet. Hopefully I'll come up with a fix eventually.

I also added an option to turn clothes ripping on/off in the clothing menu. In addition, I solved some issues with rolling bodies where they could get stuck upside down or slide around instead of rolling. I had to go into each map and add more polygons to all the floor surfaces so friction would work correctly. Now it should be much easier to roll over as a blueberry if you get stuck on your head. There might be some spots I missed, so feel free to let me know if you find any.

For the next update, I plan on adding some inflation mechanics. This will involve building some brand new systems, so fair warning -- it might take a bit longer than usual before that build is ready. I'll likely post more WIP updates throughout the process. In the meantime I hope you enjoy!

https://bit.ly/4jpopMM

Alternate Link

https://bit.ly/499NwQc

TummyTrouble (Vimeo)

Comments (65)

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jross · February 23, 2026

I know this post is a few weeks old... But an idea just hit me for something that I think would be perfect for your game. Have you considered adding a "gluttony" mechanic? Perhaps some kind of meter or something, and as it increases, your character will begin to seek and eat food on their own. The higher the gluttony, the more ravenous they become.

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Manolo De Luca · February 8, 2026

OMG, amo estas actualizaciones, si en algún momento consideras meter npc que engorden a la protagonista o incluso inflacion tipo slime, estaría excelente, quiero ver como será en 1 año el juego con todas las mecánicas venideras

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blobygon · February 8, 2026

Me alegra que te guste. Espero poder añadir ambas cosas en el futuro.

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Aesyr · January 29, 2026

You are absolutely awesome. Inflation mechanics is what I'm the more eager to see. Your game is already awesome, and I can't thank you enough for all your work <3

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BuffGruff · January 29, 2026

If I may ask, What are the planned cosmetic options you're going to add? such as maybe masks or helmets and such like that. Either way, Amazing work on this game. Quite fun to go around in and I can't wait to see what future work you have with it.

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blobygon · January 29, 2026

I def plan to add more hair and clothes especially more male options since those are lacking. Helmets/masks could be cool. Any specific suggestions for those?

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Benji Gibson · January 25, 2026

You know what could work for the backrooms theme, slime inflation or water, it would fit the vibe pretty well

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blobygon · January 25, 2026

Indeed. I want to add slime or liquid inflation eventually

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Josh_the_changeling · January 21, 2026

Great, I think if you add monobutt you'd have every kind of swelling a person could want! I was curious how realistic it would be to suggest leaving behind juice splat puddles behind when you land or do anything as a blueberry, or add a optional horniness tab that allows the person to get all hot and bothered as they swell, eat, pass gas etc until orgasm...

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blobygon · January 25, 2026

I might be able to add puddles. Not sure how but it's something I can look into. I'm not sure how sexually explicit I want the game to get but I'll consider adding a horny mood or something like that

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Carter Daniher · January 19, 2026

pretty cool update also question you have any ideas about changing characters like being able to play as character's from other franchise?

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blobygon · January 25, 2026

I wont be adding any specific characters but maybe someday with enough customization options you could make something similar to many characters

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DShield · January 19, 2026

This may be odd to request but perhaps more body sounds. (like more types of gurgles, grumbles, groans, farts, etc.) Would be nice if you tend to add an inflation route and perhaps deflation.(like the blueberry) also perhaps in the final stages add FSR or ways to improve performance on compact devices like mini pc's if its possible to do that or add more settings. 30 fps is fine but for some reason it tends to chug at maximum blob form at any shape in most maps, mainly the burger room, and the rooms with water. mostly, i hope bigger sizes will become a thing for any scenario.

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blobygon · January 19, 2026

I want to do another pass on sound effects at some point to add more variety. I still don't have a way to handle bigger sizes yet, but there might be a way for me to fake it somehow. I want to do a sweeping optimization pass at some point, but that would be a huge undertaking. In the meantime I'll look into FSR options since I don't think that'd be too hard to implement.

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Armon Pax · January 16, 2026

I have to say that this new body type is cool it just need a bit more jiggle when you slap it & it will be perfect. I hope sometime in the near future you add a stuffing & digestion as a feature for more immersive gains along with being able to save characters at their current weight level.

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blobygon · January 19, 2026

I might be able to add an option in the future for how much jiggle the slap causes. Digestion would be cool, but I don't think there's a way for me to smoothly transition from a stuffed belly to body fat. I might be able to save the current weight class per character at some point though.

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Average Big enjoyer · January 14, 2026

Man I'm looking forward to the rest of the development time this project will get! Maybe some tiddies in the future aswell:)

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jross · January 13, 2026

I may have missed it in previous posts. But do you have any plans for things like, creaking clothes, seams and buttons slowly straining until they give? That would be amazing!

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blobygon · January 19, 2026

I'm not sure if that's possible with the methods I use for clothing. I'll need to look into this further.

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Blubbsaroo · January 9, 2026

Curious if there will be an update with characters you already made can possibly be added or replace others npcs in the map, along with more customization options (mainly male focused)

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blobygon · January 10, 2026

That would be a cool feature. I can look into it in a future NPC update. I also plan to add a lot more customization options including male stuff.

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Bioshock God · January 9, 2026

I've been waiting for a belly update for a while. Great update! I was wondering if it would be possible to add hotkeys for the feeding tube and progression to the next stage buttons. Love your work <3

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blobygon · January 9, 2026

Ty! Hotkeys are a good idea. I'll look into it

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dabgab · January 7, 2026

i love this update just like every other one 😍. hopfully you add idle animations that interact with the fat. or the character saying stuff about it. cant wait for the next update!

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Someguyw1 · January 7, 2026

So fucking peak

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Zilver Crazen · January 7, 2026

The creative body shapes and the npc dialog are both really cool. I had this kinda weird idea for a body type/ mechanic ( no pressure of course ) where there might be like a strange unlock-able soda in the factory that’s makes the players tummy rumble and bloat. Then if you want, you can choose to hold it in, kinda like the blueberry juice, to charge up burps and braps that can knock things down. Then maybe the body becomes a little transparent, showing the gas inside before popping. Again, just an idea, u do u. Thanks for being one of the best devs in the scene :D

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Raine · January 6, 2026

Is there a way to port over characters from one build to another?

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blobygon · January 6, 2026

You can find the save files in this path - C:/Users/YourUserName/AppData/LocalLow/blobygon You will find folders for each build in there. Find the folder for the build that has your saved characters in it and copy all the folders inside (1 through 10) Then paste them into the newest build's folder to replace them. Hopefully I figure out a simpler way eventually.

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Ruby · January 4, 2026

This update looks awesome! Though unfortunately I can't access it, too much activity on google drive.

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blobygon · January 4, 2026

Dang. I'm not at my computer today but I'll try to get an alternate link up soon. It might let you download it after a while.

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Inspector-Jasper · January 3, 2026

Thank you for all of your hard work. Everything looks amazing. 😊 Anyway you can add NPC weight gain/feeding and dialog?

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blobygon · January 4, 2026

I'd like to add some way to feed NPCs eventually

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BrasByDesign · January 3, 2026

Happy New Year! What a fun update - the extra dialogue for the NPC's is another one of those little touches that really makes it! Great work as always, and super excited for the inflation build!

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b0r3al1s · January 3, 2026

great update as always! Is the inflation mechanic going to allow you to float in the air like a balloon? No matter what you do, it'll be great!

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blobygon · January 3, 2026

Yes floating is planned

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Dumpty001 · January 3, 2026

Happy New Year and fantastic work as always Blobygon!

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Karma TheWolf · January 2, 2026

Wishing you a happy new year like everyone else, Bloby! Quick question, and I'm sure you've received similar ones before, but are there any future plans for expanding the character customization to include options for different species? Stuff like animal ears, snouts and tails- perhaps some sort of simple fur texture for the skin. I'm sure I'm not the only one wondering if I could one day craft a fursona in this lovely game, lol.

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blobygon · January 3, 2026

It's not really my thing, but I may add some options like that someday

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Prism7 · January 2, 2026

Ooooh I can't wait for inflation!! With that said, though, take all of the time you need to make it as refined as you need to! 🥰

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CODBO2RGM2 · January 2, 2026

Suggestion for next updates for your games: More outfits and hair styles. Preferably more long hair styles that go down the back and more outfit choices like buttoned shirts, skirts, belts, ETC.

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Joob toob · January 2, 2026

I think longer styles would have to come with physics which would probably be hell to get a handle on

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PanDemonics · January 2, 2026

Happy new year! Banger update as usual

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Nick · January 2, 2026

Happy New Year, Blobygon! Definitely an awesome update for the new year! Looking forward to the inflation updates in the following months. ^^

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ShadowKing321 · January 2, 2026

Wicked update Blobygon! This was the one I was most looking forward to ^^ I did find a minor visual bug though, at the blob stage there seems to be two differently colored circles on the new shape

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blobygon · January 2, 2026

Glad you like it! I'm not sure if I see what you're talking about. Could you explain this visual bug a little more?

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howabout no · January 2, 2026

happy new year! can't wait to try it out

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rattie · January 2, 2026

Gas build up with a lot of internal churning would be very funny just saying haha

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P1S - Misha · January 2, 2026

Happy new years! I wish you the best while working on the inflation mechanic

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NomadicPervert · January 2, 2026

Happy new Year! i hope you enjoyed your new year, and plz don't worry about a deadline the work you do is amazing especially with you doing all of this by yourself. tested out your tummy dev and it was great. hope you can enjoy the new year.

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Dinghis_Khan · January 2, 2026

huge hype for inflation mechanics

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Kiunny · January 2, 2026

Automatic air pumps, fire hydrants, Sprinklers, Carbonated drinks, P-Balloons. -Lily is vibrating like a balloon stretched with excitement

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Kiwi · January 2, 2026

Banger update cant wait to see more but chest not growing with seems a bit out of place, will we see anymore like this eg just lower half or just the chest?

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blobygon · January 2, 2026

I'd like to make some body types similar to this that focus on butt and/or breasts at some point

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Raspberry · January 2, 2026

You are the greatest of making plumpiness look jiggly~♡ But quick question, is there a way that I can transfer my save data from V3 to the new Dev build or no.

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blobygon · January 2, 2026

You can transfer saves, but it's a little cumbersome. You can find the save files in this path - C:/Users/YourUserName/AppData/LocalLow/blobygon You will find folders for each build in there. Find the folder for the build that has your saved characters in it and copy all the folders inside (1 through 10) Then paste them into the newest build's folder to replace them. Hopefully I figure out a simpler way eventually.

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THunterGamer · January 2, 2026

Happy New Year, Blobygon! What a great way to start the year! I hope this and all your upcoming projects go wonderfully, and we're looking forward to seeing what the future holds.

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Grace Ashcroft · January 2, 2026

No need to apologize blobygon we all the Community understand stuff happens and all of your hard work blobygon and the update looks amazing I'm about to play it🩷🤝💯🫡

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Zeedee · January 2, 2026

eeeeee! can't wait to try this out

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YourBestClownFriend · January 2, 2026

Oooh great work!!! Super looking forward to the inflation mechanics, that should be a real treat. Best of luck on it!!

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Suzy_D · January 2, 2026

Bubble gum that turns you pink and makes you lighter

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Suzy_D · January 2, 2026

Oh!

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Jordan Smith · January 2, 2026

amazing

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Sadboi · January 2, 2026

can't wait to try it out and have some fun with it! :)

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KinkyCravings · January 2, 2026

Looking forward to playing this build. Got so excited to see the notification! Every time you post it makes my day! :D

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DegenerateCannibal · January 2, 2026

Great way to start off The New Year!