Thundarr The Barbarian: Secret of the Black Pearl...

Post-apocalyptic zaniness from '80s Saturday morning kids cartoon Thundarr The Barbarian. Two thousand years after an extinction-level event destroyed life on Earth a new world has arisen combining magic and super science.

Created by one of the sharpest minds in comics, the late great Steve Gerber, mastermind of the satirical Howard The Duck, with design work by comic book legends Jack Kirby and Alex Toth, Thundarr was clearly influenced by Star Wars (check out Thundarr's "lightsabre" aka The Sunsword) and Kirby's own Kamandi: The Last Boy On Earth.

Sounds like the perfect environment for a gonzo Dungeons & Dragons-style campaign and it just so happens that Sniderman of the Savage AfterWorld blog has created an excellent, free Mutant Future supplement based on this cartoon series (see the link in the right hand column of his blog; click on it to download the pdf).

There's also Under The Broken Moon, a free RPG based on the Over The Edge mechanics, which has statistics for the main three characters and lots of nice detail on the world as well as five episode breakdowns including creature statistics, magic spells and items .