Switched to .NET Core
24 February 2017
The project is still very much active. The website, not so much.
I have recently switched the project from .NET 4.0 to .NET Core, with OpenTK for graphics. That is a huge performance boost.
Version 0.1.0-alpha.1 is getting closer... if you want to stay up to date, it's best to view the CivFanatics forum thread.
If you like to get involved in the development of CivOne, please visit the GitHub page.