As said in the FAQ, modding is part of our plan. "We will be evaluating modding support including when it will be available and the best way to achieve it in the coming months. What we can say for now is that it should be possible to modify technologies, leaders, and other areas via simple XML editing. This may also include changing images and/or adding 3D models, but we’ll have to see. So, please check again in the near future and we may have more news on that." In the meantime, please feel free to discuss modding for the game in this subforum. What would you like to be moddable and why? We'll take your inputs into consideration when we discuss modding internally and we'll see what can be done.