Nations
The "Cold War Mod" offers only three nations to choose from, representing the major alliances that emerged after World War II. These are the North Atlantic Treaty Organization (NATO), the Warsaw Pact, which includes the Soviet Union and Eastern European countries, and The League of Arab States, which includes many countries in the Middle East. These three alliances were at the heart of Cold War conflict after World War II, which is why they have been selected for this mod.
Scenario
The "Cold War Mod" focuses on the nuclear threat that faced the world following World War II. Therefore, much of the gameplay is geared toward nuclear development, and defense from potential nuclear attack. You can choose to either try to protect the world from global destruction or start the nuclear winter yourself by putting all of your nation's resources toward military technology and becoming the dominant force in the world.
Ideology
One of the characteristics that you can define as a leader in "Hearts of Iron 2" is the ideology of your nation. The "Cold War Mod" has ideology groups that fit the Cold War period better than the ones designated for World War II. This includes Communist, Maoist, Social Democrat, Social Liberal, Market Liberal, Ultra Liberal, Dictator and Neo Nazi. These ideology groups are meant to replicate the competing ideologies of the post-World War II period.
Soviet Edition
One sub-mod that has been developed for the "Cold War Mod" is called the "Soviet Edition." This sub-mod focuses entirely on the Soviet Union, which is the nation that you will either be controlling or competing against. The GUI (Graphic User Interface) and in-game music have also been changed to fit the USSR-themed mod. Other than this, gameplay was not changed dramatically and follows the same rules and time period as the "Cold War Mod."