well it all started in the 80's with Cyberpunk... from there you've got Steampunk, DieselPunk, ClockPunk, Splatterpunk (think movies like Saw, also known as torture porn)....

those at the "punks" I know of off hand...

 

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here we go http://en.wikipedia.org/wiki/Cyberpunk_derivatives there's a good list here...

 

personally I moved on from steam to Diesel.. more fun with the Indy movies, Skycaptian, the Shadow, the Mummies... etc....