I got tired of 100 turns on IV and got the full Version of it's Daddy and all I can say is "Wow". I just can`t survive at the mid setting on a large Map even after 50 hours let alone beat it.
This is either the best Combat AI ever made for a civilian game or the most clever AI cheating I have seen. It is Evil. It is Alive. We are all Doomed.
A lot of people still is playing SE3 (and think that will continue playing after SE4, during a long time).
Go to the Borg: http://www.vendetta.net/borg/index.html
Yes, the se4 demo is really good but, I stoped playing it as well at 100 turns things are really just starting - I find in the game. So I will just have to wait for my full Version to arrive in the mail box...