AI intelligence
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Stardock Forums
I played 2 partial games in a huge galaxy. I found that setting AI to either Average or Smart made no difference as neither built colony ships. In both games, I've colonized over 50 star systems while most AI have 1 - 5 systems (with suitable planets in adjacent sectors). In the average game, I found and colonized 5 class 26 planets, 2 of them near AI homeworlds (other side of galaxy from Earth).