It is Sins of a Solar Empire: Rebellion. This quite sizable stand-alone expansion has been released, offering everyone a chance to experience the proven recipe of real-time strategy combined with the depth of a 4X game coupled with the rich universe of the franchise, without needing to own the original game.
The time of Diplomacy is over. The length of the war and differing opinions on what should be done to bring the war to an end has led to a splintering of the groups involved. The controlling powers-that-be have depleted arsenals and seemed to have exhausted all efforts of diplomacy. Trapped in a stalemate, sub-factions have rebelled and broken off the main alignments. Rebellion is upon us.
Those who do own a previous edition will spend a tenner less. Visit this page to see where you can purchase the game.
There is also word of an awesome upcoming limited Collector's Edition boxed version here, so have a look at what that will get you.
