Sins of a Solar Empire is often described as a 4XRTS game, or a game that tried to merge the action and tactics packed gameplay of a Real time strategy game with the deep, complex, empire wide strategy of a 4X turn based game. Its up to debate whether Sins succeeded in this goal, but I think all can agree that of the 4Xs of "explore, expand, exploit, and exterminate", Sins is much more focused on the exterminate than on the other three.
This mod seeks to give more depth to the other 3Xs of the game by adding additional game elements or refining the existing ones to reward players who give more strategic thought to the non-combat side of the game. Combat will still be the center point of the game, but players will find that the non-combat options available will be much more rewarding and will need to put more thought into developing their economies. This mod will also attempt to address some other weaknesses of Vanilla Sins where possible, such as increasing race diversity or improving the AI.
Faction Diversity - Exploit all new racial bonuses to crush your enemies.
Hero Units - Lead your race's champions into battle with their powerful new abilities to base your strategies off of.
Random Encounters - Keep your eyes peeled when scouting, new challenges and opportunities await you in the depths of space.
Embassies and Espionage - Friend or Foe, interacting with other Empires will never be the same again.
Ship Upgrades - Customize your capitalships and titans with unique upgrades (Rebellion).
New Planets - Your Empire will never look the same again. Meticulously balanced for competitive play.
New Skyboxes - 12 unique skyboxes provide a fantastic backdrop to your conquest of space (Rebellion).
New Artifacts and Bonuses - The fringes of your Empire hold great power if you know where to look...
New Random Events - For owners of the Rebellion Stellar Phenomenon expansion.
Civics Matter - Almost all civic structures have an impact on your Empire. You must develop your planets wisely to get the most out of them.
Culture Matters - Don't underestimate the ugly stepchild of Sins anymore, its back with a vengeance!
Customization - Play the game the way you want it with a growing library of optional minimods and enhanced mapmaker support!
WinCustomize (Diplomacy 1.34/7)
Axel Dude - For his wonderful planet textures in the Infinite Space mod, most of which is included in E4X.
IskatuMesk - For his awesome library of sound effects released to the community, a few of which are included in this mod, as well as particle forge advice.
SZ0 - A great modeler, several pieces of his work are used in this mod.
Genocyber - For his great looking Repair Drone model!
Sinperium - For making the phase probe mesh and good feedback.
ZombieRus5 - For getting channeling abilities to work correctly (after we ironed out a few bugs) and for his many hours of "experimental" modding that lead the rest of us realizing more things are possible than we thought.
Seleucia - For his thoughtful analysis and for allowing me to use some of his rebalanced abilities.
Ue_Carbon - Intelligent Feedback.
Maelstrom - Awesome new planet module meshes
Infinite Space - Main source of planet textures and other astronomy related changes, as well as some planet bonuses.
Uzi's Sins Plus - Several planet textures and bonuses have been incorporated from it.
Project Equilibrium - For an awesome set of fun balance changes.
Also check out the new Star Wars addon, Star Wars: Interregnum.