Not a mod, but rather a whole new game. This project started July 2011 by CptPriceless and myself and has been in development ever since.
It survived a dozen rewrites, me leaving for the university and later the Red Army. Yet it's still alive and doing incredibly well.
Only this time we're bringing it to the third dimension. So please keep an eye on the project and see what it grows into.
As for the story, setting and all that stuff check out CptPriceless's post below.
- 75% ready minus the content
- Loading modules/entities/lights/skybox
- Movement, physics, animations, AI
- Flexible camera
- Preliminary combat support
- Dialogue UI