In this game, players can choose to defend their countries against waves of enemies that are attacking their cities. They can choose to build different types of military equipment, such as weapons and armor, to help them in their fight.

There are three major powers in the game: the United States, Russia, and China. Each country can have up to five different types of military equipment, such as weapons and armor, and up to five different levels of defense.

There are 60 levels in the game, and the goal is to defend your country against the waves of enemies. You can choose to build your country's military equipment and upgrade them as you progress through the game.