Welcome, I think this is the only TOT thread? Why do you need to win? If you play as an alien, it will be harder, but you need to have at least two humans and probably another alien to get all of the tech tree, before you eliminate one or more AI. There are two jumping points that open up more of the tree. I think Artificial Gravity is the result of one of those points. The only thing I can think of, is they may have tipped a hut and that was the only available tech, so they were forced to take it. Did you look along the poles for the cities? They will only be on Funestis.