Space Empires IV and V

[DennisS]

4 is just fine, and yes, many people (myself included) never got 5 to run on later versions of Windows.  It really only adds better graphics anyway.

Get 4.  I still consider it one of the best games in the genre.

What he said. SEIV is one of the very best games in the genre. I really like how they did mining, and how you can set up a stream of mining transports from your mining planets to the production centers.