The Second Tiberium War is a standalone redefinition modification for Command & Conquer: Tiberian Sun.
Sadly the Tundra Terrain expansion will not be available in the mod. Due to an inexplainable crash I've had to remove the tile sets permanently.
As you can tell from the screenshot I was able to get it working most of the time but it would crash on me when I would reload the map the second time.
Looks amazing.