Hearts of Iron III

Hearts of Iron III
Developer(s)Paradox Development Studio
Publisher(s)Paradox Interactive
Producer(s)Johan Andersson
Designer(s)Johan Andersson
Christopher King
Programmer(s)Thomas Johansson
Henrik Fåhraeus
Artist(s)Jonas Jakobsson
Fredrik Toll
Composer(s)Andreas Waldetoft
SeriesHearts of Iron
EngineClausewitz Engine
Platform(s)Microsoft Windows, OS X
ReleaseMicrosoft Windows
  • NA: 7 August 2009
  • UK: 14 August 2009
  • AU: 24 September 2009
OS X
  • WW: 7 December 2009
Genre(s)Grand strategy
Mode(s)Single-player, multiplayer

Hearts of Iron III is a 2009 grand strategy video game developed by Paradox Development Studio and published by Paradox Interactive for Microsoft Windows. A Mac OS X version was released the same year. A grand strategy wargame that focuses on World War II, it is the sequel to 2005's Hearts of Iron II and the third main installment in the Hearts of Iron series.

Initially, the game received a mixed reception, largely because of the large number of bugs present in the game at release. After several patches, the game's reception improved. In December 2009, it had an average score of 77 on Metacritic. A sequel, Hearts of Iron IV, was released on June 6, 2016.