Sid Meier's Alpha Centauri(1999)

Legendary designer Sid Meier presents the next evolution in strategy games, with the most addictive, compelling gameplay yet. Explore the alien planet that is your new home and uncover its myriad mysteries. Discover over 75 extraordinary technologies. Build over 60 base upgrades and large scales secret projects for your empire. Conquer your enemies with a war machine that you design from over 32,000 possible unit types.