Well, I read an RPG book called "Mythus" once, and it took place around the Mediterranean Sea in an alternate Earth called Ærth. The premise was basically a world where chemistry and science just didn't work right. Gunpowder was inert, gears didn't function properly. Electricity and conductivity were simply too chaotic for science to function properly.
The game was so horribly complicated (I was like 11 at the time, though) where characters had at least 6 stats, and 3 sub-catergories for each stat. Experience points were some oddball acronym called "STEEP" and there was a bevy of different classes and skills. You had quirks like Edges and Flaws and even your characters birth order determined their potency (if you were the 7th child you got like this huge bonus to your magic) Magic was called Heka (it's an egyptian term, same as mana) and Heka could be stored and found in almost anything: herbs, rocks, animals, etc. You could rob Heka from anything and place it into objects, the shape and material of the object determined how much Heka it could store: a pyramid, a pentacle, an ankh and so on. The make up even more so: Wood and stone moved up to metals and then finally Hekalite.
Most notably, the Moon had life on it and was hollow. It had a whole other set of rules for how physics worked etc.
But wait... you weren't asking about other games, you were asking about stuff in SR?
Erm... Don't think there's been much save a few snippets about Egypt and the Sahara. Might try Shadows of Europe or Target: Awakened Lands or Target: Wastelands.
