What if there were enough cybernetic enhancements, that when you have certain key ones, if you took too much damage, your biological component died, and you had to play the game then on as a robot? It could instantly grant the ugly trait, stats could change to reflect cybernetic parts, and you could have something like a battery recharger (solar, gas, or radioactive), or even make it so you had to have a mod which made you sleep in radioactive zones to regenerate supply/“food”. Diseases and hunger no longer worked, but now you had to worry about running out of power, or even maybe certain things rusting if you didn’t have rain cover, or your parts locking up when it got cold.