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HTML Fataclysm

Fataclysm
Version: v0.2.0 Paid Developer: Jupitarian · Itch.io · Patreon · Discord Updated: 2025-07-14
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About this game

Enter the Excessive Expanse and experience the FATACLYSM by Jupitarian - a multiversal calamity that has brought together disparate fragments of space and time into a realm of expansive proportion. Take the reins of a group of unfortunate heroes committed to escaping the Expanse, no matter how many tries it takes - even if it costs them their waistlines over and over again.

Built in HTML as a sci-fi fantasy transformation-focused game with turn based combat, the game runs roguelike mechanics where the body transformations stack across runs.

Expect 2dcg, ai cg, big ass, big tits, female protagonist, monster girl routes, text based content threaded into a multiverse-escape shell where the heroes' bodies are the consumable resource and the Expanse is the antagonist.

Changelog

v0.2.0
An entirely new 5th party member has been added, complete with her own unique set of weight stages, images, skills, and weight descriptions! New mechanics involving party building and the ability to assign members of the group into duos Tons of new dialogue involving the new party member, with nearly every event and ending having been rewritten or added to in some way New event choices unlocked after recruiting the new party member A new multi-part sequence involving a couple of characters, made by the one and only bun! It can be found in one of the new event choices in the Penitentiary. Many of Leona's old scenes have been rewritten to make more sense in the new update, as well as a couple of minor details having been retcon'd
v0.1.3
New content added to all versions -New art for every token and icon in the game, along with a new set of weight stage icons that indicate how fat each party member is. -New artwork for every single skill in the game, along with a rework to the combat UI that changes the old text buttons to the new art. -Animations for each character's fat numbers and bars. -Several balance changes, including buffs for the party and reworks of their passive abilities. New content exclusive to Patreon supporters -A new standard enemy has been added to the Palace, the Virtuoso. -A new character skin for Astrid, the Dread Pirate Sinclair. -Challenge mode options that unlock after beating Hard Mode, allowing you to start runs with the Gourmand or with any Affliction. -The ability to skip straight to the Palace at the start of a run after Kassandra has told you about it. -A hell of alot of balance changes that have entirely reworked how the Palace plays. The area should be much closer to the difficulty that I intended for it now, so good luck getting through. There's also a new fat-related token that some Palace enemies can now apply.
v0.1.2
New content added to all versions -A new elite enemy has been added to the Penitentiary, the Toxicologist. -Reworks for both Plasma Burn and Bloating Toxin, along with several buffs for Astrid’s Plasma Burn skills. New content exclusive to Patreon version -A new elite enemy has been added to the Palace, the Ravager. -A new ending revolving around the Ghastly Gourmand. This ending is by far the most expansive in FATACLYSM so far, and it contains 12 wholly unique weight stages. -A new equippable character skin for Estelle that reworks all 8 weight of her weight stages into a giantess/weight gain fusion cop. -A vast amount of new dialogue for Leona, including a few random fat-related events. -New dialogue sprites for both Leona and the Ghastly Gourmand.
v0.1.1
Paid -A new miniboss has been added to the Penitentiary, the Executioner. She appears in miniboss encounters while exploring. -A new elite enemy has been added to the Palace, the Diabolist. She appears in elite encounters as well as in the second round of the Reaper's Rest. -Around 60 images have been updated, with changes primarily focusing on changing characters' faces to be more consistent and higher quality. -Dialogue for repeat encounters has been added to all events and endings that focus on interacting with characters. -All repeat dialogues that have been added, as well as previously implemented repeat dialogues, can now be viewed in the gallery.
v0.1
Paid Initial Release
Installation
1. Extract and run.
Developer Notes
FATACLYSM is a roguelite made in Twine that focuses on the struggles of a party of four women as they venture through a realm comprised of many different settings and times, hellbent on fattening them up by any means necessary. Fortunately for them, though, the power of the Excessive Expanse is a double-edged sword. Combat in FATACLYSM involves no normal health points, no real damage, and no silly unfattenable enemies. It only involves what really matters - girls getting bigger. All damage dealt in the Expanse, without exception, is always converted to fat.

No combatant is ever safe from the fattening grasp of the Expanse, and our heroes must do everything it takes to make sure that they're not the ones on the receiving end. That is... unless they want to be. As a roguelite, players are free to succumb to the Expanse as much as they want in FATACLYSM, and are always able to continue their journey in the future. Through their failures, though, the protagonists of FATACLYSM only grow stronger, and their capacity to get progressively bigger and bigger can only increase as they harness the weighty power of the Expanse.

Actually traversing the Excessive Expanse entails delving through vastly different layers, crawling with fattening challenges of all kind. From tactical, turn-based combat to juicy narration-based events, both accompanied by a wide array of (highly customizable) fatty sound effects, FATACLYSM presents a plethora of ways in which players can lose themselves in its world. Characters may even be brought towards an untimely, immobilizing end depicted in lengthy, descriptive defeat scenes, all of which are easily re-viewable in the game's image, event, and ending gallery. There is no overly punishing, permanent loss condition, though! The heroes can never truly be defeated in a roguelite, after all.

The Expanse also offers multiple unique settings within its respective layers, with more to come in the future. FATACLYSM currently contains two fully fleshed out areas:

THE PENITENTIARY - A futuristic prison complex, constructed with the singular goal of fattening its inmates and keeping them as nothing more than massive, flabby batteries for the rest of their miserable existences. Ruled by a cruel, iron-fisted sadist, the neon-horned Warden of the Penitentiary wants nothing more than to keep each and every member of the party locked up as her personal, blobby playthings.

THE PALACE - A lavish castle of flowing red silks and golden chandeliers, this fantastical locale of swords and sorcery holds a plethora of regal buffets, alchemical attractions, and supernatural horrors. Though the opponents of the Palace's ruler may see her as a tyrannical, hedonistic layabout, the Sovereign's keen ability to soften the disposition of others and intoxicate them with her own way of life is second to none.

If you enjoyed the game and want to support continued development, please check out my Patreon! Any contributions are highly appreciated, and supporters are able to vote in content polls that influence the direction in which development goes in the future. It also lets me keep doing what I love without having to worry about making a decent living at the same time.

Enjoy!

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