On any mission where they have high defensive fleets protecting a sector try to push a fleet through to one of there weak systems in the back. Then expand behind the enemy targeting there factories and send attacks at them. they can fall easily if they don't have factories and they won't build factories on certain worlds.
i love this game, it could use some improvements like an option to get back to the main menu or maybe make the controls smoother but other than that 5/5
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Domo arigato! ;-)