Would that make the sets alien-ist? :)
I liked it better when it was Space Police I vs. the Black-suited Blacktrons.
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Also, the gun and dynamite-wielding, graverobbing humans are the heroes of Pharaoh's Quest, while the mummies whose tombs and jewels are being ransacked are 'evil' too.
There's certainly some kind of 'ism' going on, that's for sure. :)