I started playing this game four years ago, and to be honest, compared to other mobile games of this kind, it's really good, it's going to meet a lot of interesting ideas, like rebuilding the Roman empire during World War II, conquering North America before the arrival Of May Flower, or programm5 your own code to launch the Cold War between the United States and the Soviet Union. Unfortunately, this version is incomplete. You should go to the Google store or the official website to download it. Steam has a computer version on it. But you might try HOI4, which is also interesting.
Attention , some of places in this game are not sovereign states !