agents usually carry out two kinds of activities, one is the task, and the other is the action. The task can be carried out directly by sending agents, and the action can only be carried out when there is a certain intelligence network in the country.

In the game "Iron Ambition 4", the spy system can't be turned on directly. Players must purchase and download the DLC of Resistance Movement before turning on this function.

The main downloadable content of the game includes five expansion packages: * * * Go to victory, death or humiliation, wake up the tiger, gunner in place and resistance movement. In addition, the game also provides 3 music downloadable content, 1 model downloadable content and 1 free downloadable content.