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Posted by: o_O
« on: August 01, 2012, 06:24:16 PM »

You also need the next reactor technology, gas cooled fast reactor.   
Posted by: dakillakan
« on: August 01, 2012, 05:53:46 PM »

I am rather new to Aurora and am trying to figure out how to research the next engine tier, however I can not find ion engines anywhere in power and propulsion, are there any prerequisites besides nuclear pulse engines which I have already researched.