Includes 2 items: base game and Sid Meier's Alien Crossfire expansion Mankind begins its most monumental task – the colonization of space. A crew of internationally renowned scientists and security strategists, with wide-ranging convictions and diverse ethics, embarks on a mission that will change the world. One Planet. Seven unique factions. Which will you lead? Each faction has its own agenda, each leader a final goal. You must play to each strength and exploit each hidden weakness in your quest to rule the future. Features 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