Hello!
So Ive been meaning to find a game or mod with a lot of content. This does not mean it is not a novel and instead a controllable character. For example the Fallout 4 Coldsteelj weight gain mod is very good, however the physics are lacking and the body is a bit fantasy looking. I also saw a game called Kobold care. However I do not know if it is infinite in terms of weight gain and if so are there physics with the fat?
Kobold Care does have physics with the fat homever the weight gain is not infinite/ it’s too little to notice.
Kobold Kare was really cool but developement kind of gave up on it and you have to do A LOT of other fetishes to progress the game. Not reccomended if you dont want to play through a decent amount of non-fat fetish content. In terms of mods, I had a decent time with the Fo4 weight gain by steelcoldj mixed with some vore mods, but that was a bitch to set up. In terms of something you can just install, prob sims4 wg mod or just for a straight up game a good number of the twine and quest games (with active developement or have been finished) are pretty apt with descriptors. I also reccommend CK3 WGAC and rimround. Starpounds is probably the best mod overall with just sheer content vs how out of place it seems, they did a great job placing it in the game.
EDIT: GS13 is also great for detail if you are willing to play along. Its very technically so you’d prob need a teacher and a guide, but its fun.