Some great suggestions already, I’ll throw a few more into the mix.
Coven of Calahree - RPG centred around a trio of witch sisters. I haven’t played much of it admittedly, but what I have played was pretty good.
EVORIA - Clue’s in the name, but this features vore and stuffing primarily, with weight gain further into the story. I must sound like a broken record to anyone who’s seen me give recommendations before, but the story in this is genuinely one of my favourites.
Archerquest - A hilarious romp with stuffing and weight gain shenanigans, alongside a touching backstory to drive the whole thing forwards. Early in development at the moment, but a very promising start nonetheless.
The Abugida Effect - Episodic Sci-Fi RPG with multiple intriguing plot points and characters, always keeping me guessing as to what will happen next. Features stuffing, weight gain and inflation (so far? As I said, I’m always guessing).
@Weirdobeardo89’s Joseph Earnwile series, starting with Goddess of Gluttony. This whole series of text adventure games is in my backlog at the moment, but from what I’ve read they all link together and follow the same character.
Neon Dreams - Gain Jam game with a compelling story and optional voice acting. Very impressive what was made in such a short time honestly.