As commander of the seedship U.N.S. Calypso, your mission is to discover a faster-than-light propulsion device. But beware! In the blackness of space lurk ancient mysteries. One may be your salvation, another, your total annihilation. Explore unknown planets and moons and build sophisticated planetary and orbital colonies. Race against time to develop new technologies and decipher the clues to your survival. Decide the fate of humanity as you grapple with the Alien Legacy.
Alien Legacy includes elements of city construction, research, resource management, industrial production and combat. Players must colonize a star system light years from Earth by building planetary cities and Space Stations. Several advisors guide the player through the plot and a PDA reminds the player of important tasks as objectives, revealed as the scenario progresses. Given sufficient player immersion, the game atmosphere may add to the experience of ensuring the survival of mankind. The game progresses in real-time but the game speed can be adjusted.
Some tasks must be done before a set time limit or else the game will end prematurely. For example, at the beginning of the game, if the player fails to form a self-sufficient colony on Gaea, (a colony with at least one habitat, power plant and factory) the science advisor will kill the player for incompetence and take over the command.
Alien Legacy takes place after the arrival of the UNS Calypso in the Beta Caeli star system. You take the role as captain of the “Calypso”. The “Calypso” has been sent from Earth to colonize the system. The UNS “Tantalus” was sent to the same star system after you, but because it makes use of a better engine, arrives in Beta Caeli before you do. The Calypso, Tantalus, and similar ships were sent to colonize other star systems due to the threat of humanities extinction on Earth as a result of an interstellar war. The story involves the Calypso’s attempts to find out what happened to the Tantalus and its colonies which have gone missing, as well as other mysteries involving relics of previous non-human inhabitants of the system.