Back when I was a teenager, there was were only a couple of pen and paper RPGs. Dungeons and Dragons was the most popular, but there was another game spoken of in semi-reverant tones that few played- Gamma World.
Why did people speak of it in semi-reverent tones? Well, D&D was heroic, but Gamma World was, well….THIS!
Really. It was that lethal, which is probably why it was the game that everyone knew, but few played on a regular basis. Everything in the game was designed to kill you- everything.
They even did a set of less lethal “choose your own adventure” type books for kids, here’s the cover of one of them. (I think I had this one too!)