Iron Series

The Iron Series is a subseries of Call of Duty that crossovers with the Heart of Iron series which focuses on the Grand Strategy genre and first-person shooter.

Standard Features
The Iron Series uses aspects from both series which also include several additional features for each game. The series includes custom character which the player will control and always includes perma-death.

Main Country
Rather than a main character or faction; the series as a main playable country which is the Republic of Australia. The series always progresses and each game a set end time period with Call of Duty: Iron Blood spanning 1936 - 1949 while Call of Duty: Iron Heart will span 1949 to 1962.

Save file
Each save file from each game is transferable allowing the player to pick up where they left from and conclude any war they hadn't concluded in the previous game. All resources, tech, and equipment they are transferred along with their characters (including the record dead characters).

Lack of Multiplayer
The Iron series has no official multiplayer and only focuses on singleplayer.

Games

 * Call of Duty: Iron Blood
 * Call of Duty: Iron Heart

Plot
The Iron series lacks a central plot as such the player can essentially make their own story as they go. In Call of Duty: Iron Blood - Following Rhineland; Australia severed ties with the Uk in order to avoid war with Nazi Germany. However, World War II is inevitable and will happen one way or another, however, is up to the player whether or not Australia involves itself.