Honestly my idea probably isn’t super unique but wanna get it out there anyways for the hell of it.
Its exactly what it says on the tin, its just satsifactory but weight gain related. One of the main things you have to do besides making machines, is to make specific machines that create food (can range from cookies, cakes, hot dogs, burgers, etc) that you as the creator have the taste test a small amount of every single product made. This would be made way easier later on when you have robots that fly the samples to your backpack.
The main gameplay would be around a few things
Gaining and losing weight: As you gain weight, you can have the excess weight siphoned for “essence” that allows you to upgrade other machines and is mandatory for unlocking later machines and blueprints for recipes.
Long term growth: As you get bigger and unlock more machines, most/all later machines and production will NOT work if your weight is not heavy enough, something along the lines of “skinny employee’s run the risk of getting stuck in the machines” or something such as that.
Custom Orders/Extreme Recipes: Throwing both these in the same part, but I would imagine for finishing the story. It would require you to get extreme rare ingredients (essence of chocolate, compressed sugar kilo tons, True Cinnamon, etc) that would require both machines and baking machines to properly make.
Climate machines: You can’t exactly make ice cream and other cold dishes in the heat, so another thing would be making sure those types of machines would get the proper cooling and storage for them.
What would end game look like?
An enormous auto-mated factory, pumping out hundreds of different foods, multiple drones bringing in heavy amounts of samples from the ends of the supply lines to a storage/feeder of the players choice. There could be a liquid backpack option, an enormous silo to just chug it all down after it’s been blended or just snacking nonstop whenever food gets delivered. Along with an anti-gravity suit that’ll allow the player to still move despite being around 1000 pounds by the end of the game I would imagine, or maybe heavier? not sure
I love the idea of going to even more extreme weights, needing hoverchairs to move around as well but not sure if there’d be any more game mechanics at that point
The main reason I made this idea up is cause the gameplay loop of satisfactory would go PERFECTLY for a long term weight gain game, which there aren’t many of out there.