Formamorph
An advanced, AI-powered text RPG engine with extensive 3D character customization, you can create your ideal avatar and watch as your body changes and evolves throughout your adventures. From hairstyle and eye color to starting body shape (hourglass, pear, apple), the customization is in your hands.
Note: The new AI tripled the memory limit to 10K, but users reported degraded performance at high memory usage. Reduce max memory to 6K if you think the AI is misbehaving.
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The engine focuses on the bodily transformative aspects of adventure. You can experience changes such as the size of your belly/breasts or the overall fat distribution in your body. You can undergo virtual pregnancy, breast/belly inflation, weight gain, and more. With AI-powered storytelling, each playthrough is unique and tailored to your choices.
There are 4 starting example worlds to explore, although I have to admit they are not quite fleshed out yet as my focus was entirely on getting the engine to run efficiently XD
You can freely modify the world and share it, I hope maybe I can create a space for sharing and playing different worlds.
For the AI Settings you can freely set the AI endpoint yourself, run it locally too. By default it uses a small AI model (nemo gptq) hosted on my potato PC.
Best way to play is to use your own AI, here's a quick setup guide
| Updated | 3 days ago |
| Status | In development |
| Platforms | HTML5, Windows |
| Rating | Rated 3.8 out of 5 stars (259 total ratings) |
| Author | FieryLion |
| Genre | Interactive Fiction |
| Tags | Adult, bbw, belly, Erotic, Female Protagonist, inflation, pregnancy, vore, weight-gain |
| Average session | Days or more |
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Development log
- How to download ALL user created worlds48 days ago
- Custom Character VRM Model GuideJun 02, 2025
- v 1.2.0 Portrait Mode! 5x Faster AI, bug fixesJun 01, 2025
- v1.1.8-1.1.11 Sharing Worlds!Apr 30, 2025
- v1.1.6 & v1.1.7 Dynamic Stat Logic, AI NotesApr 26, 2025
- Dynamic Stat Calculation GuideApr 26, 2025
- v1.1.4 & v1.1.5 New Features & FixesApr 06, 2025
- v 1.1.0 & v1.1.3 Major Improvements!Feb 18, 2025




