Sector Siege needs improvement

Those are solely PC games if I'm not mistaken. There is a huge difference between PC devices and mid-range mobile devices. Sprites are nowhere near that size, units are made up of 1-6 sprite pieces varying in size. Closer to something like 100x100 in size. But again, rendering is not the issue Although if one chooses the wrong way to implement fog of war on mobile, that will be it for some devices. It will simply kill performance. This varies a lot across different brands and devices too.