Slitherine announces Pandora: Eclipse of Nashira, an upcoming expansion coming later this year to Pandora: First Contact, their Windows OS X, and Linux 4X strategy game. There are details and system specs on the product page for the add-on, which will require the original game to play. Here's word on what this will involve:

With Eclipse of Nashira, new dangers and opportunities enter the world of Pandora. A new faction shows its face, talking of peace and friendship while their spies operate behind enemy lines. Nothing is what it seems anymore, as agents conduct covert warfare of espionage and sabotage, inciting revolts and stealing technologies. At the same time, another alien species native to the planet has appeared, lurking in the shadows. In order to overcome this new alien menace, the different factions start to expand beyond the planet's landmass to generate more resources, opening up a new frontier. To deal with all of these unfamiliar threats and opportunities, Pandora will be seen in a new light and players will have to develop a whole array of new strategies to maintain dominance over the planet.