Imagine a War where Superscience replaces Science, and pulp heroes save the day from Evil criminal masterminds! Superscientists use computators, or Babbage thinking machines, to create mecha-like tanks; super-advanced jets and rockets to make fighters capable of orbit; light but indestrcutable alloys to make massive armoured Zeppelins that rain down death and destruction.
That's the setting of Gear Krieg.
Boots has run a Con game, and is running a long-running campaign, set in the Gear Krieg universe.