: To make a custom mod "piece," use the HOI4 Launcher under "All installed mods" -> "Upload mod" -> "Create a mod" to generate the basic file structure.

: Click the logo at the top left to enter the main forum. Scroll down to the "Steam Content Sharing" section, which is the primary hub for game files and updates.

If "make a piece" refers to creating game elements within HOI4 itself: : Open the Recruit & Deploy tab (

If you're asking about how to play as a specific country or roleplay a certain scenario in Hearts of Iron IV, or perhaps inquiring about the game's mechanics, characters, or strategies, here are some general tips that might be helpful:

HOI4 is very mod-heavy. Cracked versions work fine with mods from (manual install) or local mods, but Steam Workshop mods require workarounds (use workshop downloaders).