Nice read about the changes introduced in the first update to the Gamma World. If you’re unfamiliar with this ttrpg and its setting, in his retrospective James links another article about the 1e.
https://grognardia.blogspot.com/2023/04/retrospective-gamma-world-second-edition.html
[email protected], post-apocalypse
It was called Expedition to the Barrier Peaks. It was one of the earliest modules and was made by Gary Gygax himself. It’s part of the same series as Tomb of Horrors.