Post-Apocalypse and science fantasy rpgs are seeing a renaissance right now. Numenara was released last year, the Metamorphosis Alpha kickstarter was a huge success, a DCC version of Gamma World called Gamma Crawl Classics is under playtest, and the Paizo folks have even given us their take on the setting with "The Land of the Fallen Stars."

Crawling under a Broken Moon is a zine for the Dungeon Crawl Classics RPG. It's based on a post apocalyptic world that you might be familiar with from the 80s. I am a huge Thundarr fan. I remember watching it over and over on Saturday mornings when I was a kid with my brother. We even had a special stick that we found in the backyard that was our "Sun Sword."
The love the DCC rules too: the funky tables, luck, spell burn, corruption, deity disapproval, deeds of arms, the "funnel," the whole crazy thing. My DCC game kinda fizzled out a while back. My group liked playing the 0-level peons through the funnel, but once they were 3rd level, they seemed to lose interest.
DCC was the first "OSR" game that I ran and I wasn't really sure what to do with it. The rules are vague, the characters are all wildly unbalanced and some of the adventures are just plain weird. I tried to run it to "straight," like I was playing D&D 3E. That's not the way to run DCC. To run DCC you must embrace the gonzo. "Oh you rolled a 20 on your web spell? You webbed everything and everyone within 100 yards. What now?" Most of my old DCC group has since become a thriving Dark Heresy group so it all turned out well.
DCC is a perfect fit for a Thundarr game. The sorcery is right there, and the super-science is easily added. The first issue of Broken Moon does the tech for you. It has rules for modern weapons and a new class that specializes in Tech. The second issues adds in mutants and mutations. (In true DCC random table style.) Each issue also has a section called "Interesting Places to Die," which describes a full adventure location. The second issue's location is "The Floating Tower of the Cyberhive," which I will definitely be using at some point. Once +Reid San Filippo puts out a few more issues I I'll have to try and con a few folks into a game.
If you're an OSR fan but not into DCC, make sure you check out +Tim Snider's superb Thundarr conversion for Mutant Future over at the Savage Afterworld. His Thundarr session was my favorite game from NTRPG con this year. When I run a Thundarr game it will be a glorious mash up of Tim's stuff and Crawling Under a Broken Moon.
Also, watch "Lords of Light," the short documentary on the making Thundarr. Did you know that Jack Kirby, yes, THAT Jack Kirby, did some of the writing for Thundarr?