Technological research is also controlled by the player. Moving the sliders would result in different bonuses and penalties, allowing for a range of choices and strategies. The player can also alter the social and economic policies of their nation using sliders, such as democratic versus authoritarian, free market versus central planning and so on.

The player can declare war, make alliances, claim and annex territories. The player also has the ability to control the appointment of military leaders of land, air and naval units as well as to control the appointment of individual government ministers and military commanders in key General Staff positions. The player can build land divisions, aircraft fleets, and naval ships/fleets, and combine these into corps and armies.

1936 - The Road to Another War (starting on January 1, 1936).

1914 - The Great War (starting on June 27, 1914).

Darkest Hour Full: this version is available as a mod without any compatibility with HOI2 and implements or reworks many new features, the most visible difference being the new map and research system.ĭarkest Hour Full provides different grand campaign scenarios (where it is possible to choose any of the nations involved) or battle scenarios (focused on single theaters of operations, with only a few nations involved and playable).

Darkest Hour Light: this version is available as a mod with only a few changes from HOI2, but nearly all new features are enabled.The number of changed files has been kept as low as possible and all-new options are disabled or set as close as possible to the original settings. Darkest Hour (core game): this version is focused on compatibility with Hearts of Iron 2 Armageddon and all mods available for it.Moreover, the most important changes to the engines have been added as mods to the core game, with the name Darkest Hour Light and Darkest Hour Full: This has been considered crucial by the development team to make it easy to port community-made modifications from Hearts of Iron II to Darkest Hour. Darkest Hour is, at its core, an evolution of Hearts of Iron II: Armageddon.

Hearts of iron 4 navy