Deep content for Italy, Ethiopia, and Switzerland. The "All DLC" Package

The phrase typically refers to a specific file archive (likely a compressed .zip or .7z file) containing Hearts of Iron IV (HOI4) updated to version 1.12.3 , along with all its expansion packs. This specific version is significant as it was a post-release patch for the major expansion By Blood Alone , which fundamentally changed naval and air warfare in the game. Context of Version 1.12.3

Puppet systems and Commonwealth focus trees.

Focus trees for Central European "buffer" states.

Similar to the tank designer from No Step Back , this allowed players to customize airframes with specific engines, weapons, and electronics.

A complete rework of how territory is divided after a war, introducing a bidding system to prevent "border gore".

Massive updates for China and the Japanese internal politics. Man the Guns : Naval designer and deep maritime mechanics. La Résistance : Espionage, spies, and resistance mechanics. No Step Back : Soviet Union rework and the tank designer. Summary of Gameplay Impact

A version listed with "All DLC" generally includes the following major expansions released up to that point: