Played GC2 Dreadlords, released years back, impressive, unique, if a bit unpolished compared to what came later. Pretty cool space-ex/colonization game, many ways to win, cultural to military, & special techs for good, neutral, or evil based on the decisions made during the game. Dreadlords was the only game from the co I tried so far. AotS is from them too iirc. Even if not many play, seems like it comes up every time a new dx12 bench is made.
Galactic Civilizations 3 has really changed since the release. New things keep getting added and many updates happen to make it better. I play the game from time to time and I have to warn you though: If you start playing make sure you set your watch for a specific time period or you might look at it later and realize its 3 in the morning!