Hi, I took a look at the game, and honestly, it depends,
If you’re trying to replicate pixel-by-pixel behavior, I think it would be really challenging to achieve that using the Upside Engine, mainly due to performance concerns. The most optimal approach would probably be to create a custom engine specifically for that game using EditableImages, since you’d need to work at the pixel level to simulate the behavior of countries and related systems.
However, if you’re referring to making an RTS-style game in general, then yes, that would absolutely be possible, but not with such specific pixel-level features.