I've researched the only visible prerequisite "Colonization Focus" so why can't I research "Atmospheric Cleansing"?
Bug? Is there a hidden prerequisite?
I ran into that problem as well? Does anyone know if it has to do with the Age you are in? I assumed you had to reach the third age to colonize those techs.
You have to reach the correct "age" to research techs. You have to research a certain number of techs in each age to advance to the next age. This is indicated by the highlighted bar at the bottom of the tech tree.
Excellent! Thanks aerez4546, very helpful!
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