Gamma World, and post-apocalyptic settings in general, are a frequent topic in the RPG blogosphere. Heck I follow more than a few sites dedicated to nothing else. Most are set in a Mad Maxian future, but when my friend Josh and I played Gamma World back in the day, we had something slightly different in mind, thanks to this …
Rock and Rule! I still have a soft spot in my heart for this little gem. Come on, admit it – Angel is the hottest mutant to ever grace the silver screen. So, where is your Gamma World?
Land of Nod 
A few parsecs from Vanth.
Or possibly Plagueworld Gamma on the later Star Frontiers charts.
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This, Thundarr, Radioactive Dreams, and A Boy and His Dog are Gamma World.
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In the distant past of my Wilderlands, or aboard the Starship Warden.
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The place were Thundarr, Kamandi, Planet of the Apes, and Judge Dredd meet.
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Gammahawk
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Oooh, now I'm jealous. I would've totally played in this setting, particularly between 1984-1989.
My Gamma World is currently at the intersection of every '70s dystopic enclave film ever. (THX-1138, Logan's Run, A Boy and His Dog, etc.)
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My last actual GW campaign was Narnia & Paranoia meet Kamandi wandering around in Deathlands
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