Sid Meier's Alpha Centauri 

Sid Meier's Alpha Centauri is a sci-fi strategy game for Mac.

Main features:

- Includes the Sid Meier's Alien Crossfire expansion.

- Great spin-off of the legendary Civilization series, in a refreshing Sci-Fi setting.

- Design your own units. Balance their speed, power, and toughness to suit your current tactical needs.

- Seven factions to chose from, each with its own artificial intelligence model that creates a very suggestive feeling that you are up against real people.