From Wikipedia: Civilization: Call to Power (CivCTP) is a PC turn-based strategy game developed by Activision as a successor to the extremely successful Civilization computer game by Sid Meier. It was ported to Linux by Loki Software. One of the most noticeable differences from the original Civilization is that the timeline of the game does not end in the 21st century, but rather goes to the year 3000. There are five epochs in this game: Ancient Age, Renaissance, Modern Age, Genetic Age, and Diamond Age. In the game, space colonization and sea colonization become a reality with appropriate technological advances (available in the Genetic Age).