Help me develop an idea for a rule-light WG TTRPG~

Hiiiiii~~~

I want to make my own TTRPG focused on weight gain, stuffing and all kinds of struggles that come with that! To elaborate on my preferences - I like unrealistic stuffing and weight gain when normally thin belly can take a beach ball shape and then turn all of it into soft fat very next day! But I also like to pair it with a semi-realistic effect on the person eating so much. Overwhelming sensations, squeezed lungs, eventually non-working legs and all that. So this is exactly how it works in my game. You can turn from a light athlete into a burping motionless blob in mere weeks~~

Now about the world - it’s a magicpunk fantasy! Mix of wizards, gods, machinery and guns. And sorry to disappoint but as a lesbian I want it to consist entirely out of women! Just don’t worry about reproduction for now…. What’s interesting is how I integrated weight gain into this! I don’t really like WG games that treat said WG as a punishment and while it makes sense that turning into a fat pile of lard will give more troubles than assistance I can’t help but want something where it’s your GOAL! By becoming fatter and increasing your body volume you’ll have more space for life force to fill you - the energy that fuels all living things and the more one has the stronger they are. And being obese is a beauty standard here of course tehee~

I want to keep game’s rules and systems relatively simple to maintain around 67% kink to 33% gameplay ratio so don’t worry about me taking too big of a burden with it. I would also like some feedback to know how I should realize certain ideas for it. For example - considering the connection between fat and power I’m thinking instead of traditional abilities giving stat ups and skill unlocks at certain weight milestones!

I’m also planning 5 classes for it: warrior, scout, cleric, warlock and engineer. I’m considering letting players choose to go into different “branches” when upgrading so that these 5 classes could potentially sprout into dozens of narrow archetypes.

There’s a lot more I simply can’t fit here (I should probably make a separate doc for it tehee~) so for any questions, suggestions and general sign interest just reply - I’ll be happy to discuss!~~~

Ok, you don’t want Weight Gain to be a punishment, but you also want “squeezed lungs, eventually non-working legs and all that” which sounds like a punishment.
What you are going to want to do is make it a Trade off, where the weight gives its own benefit to offset the detriment.
What do you want that trade off to look like?

Are you thinking “pounds = spell points/class resources” or something else like social status that can be leveraged in social situations?

Also got to ask, is sex/gender restriction going to be something you want baked into the system or is that just “world details not system requirements.” And if it is a requirement, how is it enforced mechanically?
A system and its setting are kinda different things, systems can work on their own when put into a different setting, so the players should know if the system Sex locks things.

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Hello, how are you? I’m a programmer and this project sounds really interesting. I’d be interested in helping you develop the game systems and mechanics. If you’re looking for someone to commission for the programming side, I’d be happy to discuss the details and see how I can help!