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steampunk takes place in the age of the victorians, often during a war of some kind, usually fought with airships and odd guns. a mechanical dystopia, using clockwork and such, and steam. imagine a world that has the elegance of the victorian age, with brass filigree everything. and our current world, minus plastic, rubber, and steel (for the most part). where everything is run on steam power, with lots of pollution and crime.
there are potential super hero's using home made tools. but that's a different genre in the same class.
a 1000 leagues under the sea is a steampunk story
inventions are unusually complicated, just like they were when they were first invented. cleanliness is not important.
cyberpunk is like steampunk but it takes place in the future, also usually a dystopia. cars flying, laser guns etc, all the while holding onto usually a deco past - like batman and gotham.
---Mike Savad
MikeSavad.com