The Historical Plausibility Project is a mod for Hearts of Iron 3 and its expansions with the goal of helping the game reach its full potential as a half-historical / half-sandbox game. The mod features a vastly improved AI, historical OOBs for every nation, complex internal politics, a reworked leadership system, the Soviet invasion of Poland, HOI2-style doctrines, capital ship modernizations, over 6,000 unique unit pictures, and much more. The HPP is the result of the efforts of the HPP team's five members of Slan, TheBromgrev, TZoli, SSmith, and Nephandus from the ParadoxPlaza forum, and its main forum is its official ParadoxPlaza forum, which Paradox requires proof of game ownership to enter. The HPP's forum contains the mod's FAQ, Submod downloads, country guides, and small hotfixes. In addition, part of the mod's previous work to the East Asia part of the map is now in the Their Finest Hour base game for everyone to enjoy.
Latest full version of the mod, compatible with Their Finest Hour 4.02. The forum hosted on ModDB has a list of known bugs and issues. When you start...
This is the manual for the final Hearts of Iron 3: Semper Fi v2.04 version of the mod, and is only accurate for that version. Separate manuals are available...
This is the manual for the final Hearts of Iron 3 v1.4 version of the mod, and is only accurate for that version. Separate manuals are available for the...
This version of the mod is the final HOI3 1.4-compatible version. It is not compatible with any of the expansions. A pdf manual that summarizes the major...
This version of the mod is the final Semper Fi-compatible version. It is not compatible with HOI3 1.4 or HOI3:FtM 3.0 or later. A pdf manual that summarizes...
Latest full version of the mod, compatible with For the Motherland 3.05 or 3.06 only (if you have TFH, you can still play this mod, but you won't see...