I’ve never even attempted anything even remotely close. Not just a different game, but a different sport. Five days is my record. I don’t think I could go longer without an IV.
The pain and hangry-ness goes away after thirty hours or so. Less than two days, but close. That’s why when I fast I generally plan for two-three days.
It is insanely important to consume electrolytes though. A person’s nervous system will collapse without nacl, potassium, zinc, ascorbic, and mag. That’s why for extended fasts a saline is pretty damn important.
I am neither a doctor or lawyer. Before you think about doing anything extreme, it is your responsibility to consult with proper counsel. It can be life threatening or worse.