One of the best turn based strategy right now. Can be a decent enemy or a best friend with Civilization!!!
There are many things for you to discover. I think for you to visualize it easier, I will say we start as Alan Bradley - leader of human. At the start of the game, we just have one planet Earth.After 6 turns or so, you completed building your own Colony ship to have some citizen move to Mar - Another and only inhabitable planet from Solar system and then after that, you will start a bunch of stuff like negotiate with other spices about trade agreement, gift(Bunch of gold) or you can even buy, sell technologies you have discovered with your fine scientist work on labs.
And then, there will be the time war comes. You will have bunch of normal ship design to choose from but if you want something unique, the game will support you with this. It will give you everything to make your own ship. I personally did make some Star Wars based ship like X wings or Star Destroyer and it turns out to be pretty cool. If you want to design a great ship for your own, this is your game.
Finally as usual, the modding community of this game is really big that it can actually fight with games such as Mount&Blade. It will have new Spcies, new campaigns(Even the base campaign is great), new model of ships...... The modding of this game is huge and even if your bored with normal game, you can always try the mod.
Anyway, that was just a very brief review of this game. I can't just compress an encylopedia of galactic civilization into just one review. You have to play and then feel it. It isn't like any game you tried before........... trust me. :P