The game features a sandbox mode, allowing the player to choose different types of solar systems to unlock achievements. The playing field is a 3D web of planets and other celestial objects in the orbital plane of one or more stars. Sins of a Solar Empire is a space-bound real-time strategy game in which players control one of three different races: the industrial TEC, the psychic Advent, or the alien Vasari. A third expansion, the stand-alone Rebellion, was released in June 2012. A package combining the original game with the first two expansions was released at that time, with the title Sins of a Solar Empire: Trinity. Its first content expansion, titled Entrenchment, was released as a download on February 25, 2009, and its second content expansion, titled Diplomacy, was released as a download on February 9, 2010. The game was released on February 4, 2008, receiving positive reviews and multiple awards from the gaming press. Players are given control of a spacefaring empire in the distant future, and are tasked with conquering star systems using military, economic and diplomatic means. It is a real-time strategy (RTS) game that incorporates some elements from 4X games its makers describe it as 'RT4X'.

Sins of a Solar Empire is a 2008 science fiction real-time strategy video game developed by Ironclad Games and published by Stardock Entertainment for Microsoft Windows operating systems.

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