Yea...you should probably just skip right to GalCiv III: Crusade
With the Steam Summer sale coming up, we wanted to make sure that the base game of GalCiv III gets a nice refresh. It's proving difficult because while GalCiv III: Crusade is sold as an "expansion pack" to GalCiv III, under the covers it's more like a sequel.
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The screenshot above is just some of the changes to the diplomacy screen. The underlying code base is very different.