2

The info box for the Chemistry upgrade just says "TBD".

Chemistry Info

Does this upgrade do anything?

  • Classic Arqade. – troylatroy Sep 24 '14 at 21:42
  • 3
    @troylatroy: I swear, some mad genius built this game specifically for the purpose of farming Arqade question titles. – Williham Totland Sep 25 '14 at 12:39
4

Chemistry is a very significant upgrade. The TBD refers to the flavour text, which it obviously is lacking because "TBD" stands for "to be determined".

Chemistry unlocks the crafting of alloy as well as:

Buildings

  • Oil Well
  • Calciner

Upgrades

  • Alloy Axe
  • Alloy Barn
  • Alloy Warehouses

Source

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