Damn. Obvious now you've mentioned it, I just loved the wave defence side of the game.

Thanks heaps

Last few games I'm experiencing severe FPS drops to under 20. The factories aren't very large, definitely not mega-factories, but I do use BobsMods and SpaceX.

Computer is;
Intel Core i7-6800K CPU @ 3.40GHz
32GB installed RAM
64 bit processor and operating system
NVIDIA GeForce GTX 1060 6GB

Thanks ...