I mined up some Bauxite,and remembered from geology class that it's a great ore for aluminum
I didn't think much about it until I found the Rust deposits in the lower levels
Then I melted the bauxite and got... Aluminum Oxide
Crap, now I remember
Industrial aluminum manufacture requires passing electricity through molten aluminum oxide, so I set my sights on unlocking the Electrolyzer
But now, now your guide informs me all I need is some HFl
Allow me to cackle maniacally as I rewatch Mythbusters
(OMG this game is so cool)