I'm playing on an insane sized map with only the research victory condition available and unlimited turns. I'm trying to get the ideology achievements (which are too difficult to get IMHO). The problem is that I've researched every tech and the game is not letting me finish my next turn. It keeps asking me to select new research but, because everything is already researched, I cannot select anything. It seems like this is something that should've been noticed already but I can't see any way to continue. Is there any way to continue my game? If not, I'd say that the ideology achievements are not attainable without seriously avoiding research from the start.