Downloadable content (DLC) is content built by Paradox Development Studio (PDS) as an extension or add-on to Hearts of Iron IV. They are modular in nature, which means that a player can choose to play with or without a given DLC by checking them out at the launch menu. An expansion DLC is normally accompanied by a free patch that gives players most of the new content as not to hinder the playability of the game. As such, most DLCs are seen as optional content for players who wish to have a better gaming experience in exchange for some monetary support.
Multiplayer games also benefit from this compatibility, that is to say, if the host has a gameplay DLC (expansions and flavor packs) the player does not, the game acts as if the player has it.
The base game is required for any and all DLC relating to the game. While cosmetic/music DLCs can be used with any game version, content DLCs can't be used prior to the version they were released with.
Hearts of Iron IV
06 Jun 2016
Total strategic war: War is not only won on land, sea and in the air. It’s also achieved in the hearts and minds of men and women.
Authentic real-time war simulation: Let the greatest commanders of WW2 fight your war with the tools of the time; tanks, planes, ships, guns and newly discovered weapons of mass destruction.
Assume control of any nation: Choose from the greatest powers striving for victory, or the small nations trying to weather the storm.
Turn the world into your battlefield: Experience the full WWII timespan in a topographical map complete with seasons, weather and terrain. Snow, mud, storms can be both your strong ally and a ruthless enemy.
Negotiate or force your will: Experience the advanced politics and diplomacy systems, form factions, engage in trade for resources and appoint ministers to your party.
Intense Online Combat: Battle in both competitive and cooperative multiplayer for up to 32 players. Featuring hotjoin and cross-platform multiplayer.
Give your nation a unique edge: Experience the flexible technology system, where all major powers get their own unique identity. Develop detailed historic tanks and planes through research and army experience.
Equipment Conversion: Update your arsenal by converting older units - or make use of captured enemy vehicles and gear.
New Diplomatic Interactions: License military technology to bring other nations' weapons to the field or sell your advances to the highest bidder.
New Puppet Interactions: Fascist countries get new subject levels like Reichskommissariat, with access to licenses, industry and strategic resources. The instated governments are held in an iron grip, making it harder for them to break free.
New Music and Art: 3 new thematic musical tracks from composer Andreas Waldetoft, new art content for the four focus nations, and new troop voiceovers.