on later levels spawn 2 bosses, but 1 power up each
starts at simulation.difficulty > 23 //on hard mode level 6, level 12 on easy, level 4 on why?
makes combat harder, but also means that you will always get at least 2 drops per level
you used to have a chance to only get 1 near the end of the game
I'm guessing this will lead to about 3 more total tech by the final boss
abiogenesis - removed
parthenogenesis - doesn't duplicate bosses anymore, +8% duplication