Zanki Zero-ish, Get new abilities by killing yourself in unique ways (soiled, virus, poison, bleeding, killed by monkey, cliff, debris, etc.)
Also kind of Zero Hero Project-ish, roguelite
Eating until you are about to die is a very uncommon thing I bet. Hell I get tired really quick if I eat past full. I can't imagine what eating to death would be like I imagine food would start coming up into your mouth before. I'd still think you'd pass out before you could eat yourself to death
I'd be double checking whether my body returns to what it was when I saved just in case, eating that much would definitely make your weight go up. I mean I know there are those who like thicc but that will be a bit extreme.