The popular HPP mod for Hearts of Iron 3 is now on ModDB! The HPP is a major modification to HOI3 and its expansions, changing many aspects of the game to provide a more rewarding and challenging gaming experience. The Semper Fi and Hearts of Iron 3 versions are complete and are available here as downloads, but are no longer supported. The For the Motherland version of the mod is still under development but is 90% complete. The new 3.06 patch did not contain anything that would affect the mod, and the mod is on track to be completed for For the Motherland before the new expansion Their Finest Hour is released. In fact, it would be more accurate to say that the HPP didn't need to be adjusted for patch 3.06, because large parts of 3.06 came from the mod. Portions of the mod will also be included in Their Finest Hour, some of which can be seen in the E3 screenshot from the upcoming expansion showing the 2nd Sino-Japanese War.
The mod's primary website is its official ParadoxPlaza forum, which requires proof of game ownership to view. Minor updates will be posted in that forum, and the mod's FAQ and country guides can be found there as well. Major updates will be posted in this profile once released.