paulhager
Chieftain
SMAC/Alien Crossfire were an interesting progression. I had hoped that Firaxis would build on those games. It also played reasonably well and reasonably fast multiplayer - I played a number of games with my then 8 to 9 year old daughter. It was around the time that she started to become good at graphics and did some very nice skins for the game. Any game simple enough that a 9 year old can do mods but complex enough to challenge is a good game.