Hearts of Iron IV

Hearts of Iron IV

17,288 ratings
Old World Blues
1,368
871
431
301
387
120
466
419
80
268
104
92
71
109
85
77
35
59
59
58
51
50
50
   
Award
Favorite
Favorited
Unfavorite
File Size
Posted
Updated
3.544 GB
Oct 23, 2020 @ 5:21am
May 4 @ 8:22am
130 Change Notes ( view )

Subscribe to download
Old World Blues

Description
War, war never changes.

Old World Blues is a total overhaul for Hearts of Iron IV: starting in the year 2275 and set in the Fallout universe. Experience the postapocalypse like never before with a dynamic war system that ensures that the AI nations act on their own, respond to aggression, and strike when their opponents are weak. Forty seven national focus trees—ten of which are generic—keep the game exciting as numerous powers contest in a battle to control the Wasteland. With the use of “Historic Focuses”, you get to decide the path famous Fallout factions took, directing generic nations, and changing history as you see fit.

Old World Blues is the definitive Fallout experience for Hearts of Iron IV, a total overhaul that uses its expansive list of changes to make the game a truly new and unforgettable experience. With over six years of development time and glowing reviews across the board, we assure you; you’re in good hands here. Welcome to the wasteland, friend.



  • An entirely custom map of North America
  • Mountain ranges realistically represented as impassable terrain
  • Navigable rivers made of sea terrain spanning the entire map.
  • A completely unique, heavily Fallout-inspired UI
  • 34 new unit types
  • Custom unit voices for major nations
  • Custom unit models for various nations and nation types, from the NCR and Generic Settler to The Atzlan and Supermutants
  • Unique 3D models for iconic Fallout robots, Power Armour, and vehicles.
  • Over 4,500 custom focus icons
  • Over 1,300 new idea icons
  • Events and descriptions themed to perfectly match the Fallout style
  • 92 unique focus trees centred around important Fallout factions or other regional powers
  • 5 generic focus trees representing different groups in Fallout: raiders, tribals, utah tribals, settlers and vault nations
  • 10 themed puppet focus trees representing the outcome of large nations installing hegemonies across the wasteland
  • 4 new ideologies representing the nature of groups found in Fallout: Elites, Intellectuals, Ruler, and People.
  • Custom artwork for all leaders and generals
  • Unique Fallout S.P.E.C.I.A.L. stats and perks replacing Leader Traits, making each military leader a real wastelander.
  • A one-of-a-kind research tree that converts the diversity of Fallout’s technology into HOI4 seamlessly
  • A unique series of government laws and systems that enable developers and players to express the unique quirks of
  • Fallout's many distinct societies
  • Every music track from Fallout bundled with a custom music-player
  • An extensive and incredibly talented submodding community
  • A unique scavenging system that immerses the player in the Fallout world
  • A unique caps economy system, with ties to scavenging and gun markets.
  • Savage raiding mechanics for the mightiest raiders on the west coast, the Broken Coast
  • An ancient intelligence who slumbers within the heart of Mexico
  • Old ideas and new enemies in Texas and Oklahoma



  • A fully realised Fallout strategy experience
  • The entire continent of North America covered by factions
  • Every in-lore faction included in some form
  • 3D models for every unit, vehicle, robot, ship, and plane
  • Unique 3D map models depicting icon Fallout locations
  • Numerous news events, country events, etc to make the wasteland less dull
  • Unique decisions for major nations, generic decisions for each of our three primary groups
  • Overhauls of every aspect of the game, making every part of OWB unique



Current version: 5.0.6
Compatible with: Version 1.14.*
Important Links:
Supported languages:
Recommended setup:
  • All other mods off EXCEPT OWB and its companion music mod/any submods
  • UI scale of 1.0 (default).
  • Resolution of 1920x1080
  • NATO counters: off


  • Old World Blues would not be possible without the host of wonderful developers we have working on the team currently. Each of them brings unique skills and thought processes to the mod, without which we would never be able to achieve the quality we constantly strive for: 0009ddet, 4l3x4nd3r, Aelfred, Aida.Valuna, AlphaSimp, AnApostrophe, Arksmith, Baldu00, Basta, Chacolah, Coffee, Cookie_crackenburg, Darkspawn7, Dodo98, Featherus, Fored, Gonderlane, HappyNTH, Herckeim, Insert Meme Here, IronVanguard, Jeraos, Lia, LimonenZitrone, LusaLy, McGebe, Mikael Kerularius, MFG, MrBlazzar, Niko, NuclearForest, Octaman, Overlord, paradoxsong, Pogge, Pontifex, The Professor, Ractoon, Shaysonio, Silverfishv9, Skoodge, Slappy, Snowlet, Spiky 38, StealthArcher, Supersonic Spaghetti Warrior, Subway, The_Colonel, The Human Called Daniel, ThatDamnMonkey, Theseus0467, tran, violet, wtchappell, Xeno, Yard1, and Zusk!

  • We're also incredibly grateful to all former members of our team that have contributed over the years. A special thanks to all of them for their work and contributions in content design, GFX, writing, coding, music, and everything else you see in the mod! Abyssinian, Ahmex, Anbory, Anthony Trollope, AntoniusMagnus, Aquila, bronzeroom74, Calph, CelsiuZ, CGS, Chism, Clanky4, Clockwork, Dan, David, Faeelin, Foulsbane, Freddy, evil_c0okie, Ewancarey, Garnithor, Goblin, HK33, ICodeMaster, Indyclone77, jackyboygood, Karlov, KD, KrakenKing, Lightning Eagle, Loonybinjin, Mason, Mechano, Meldanen, Michael, Militus, Momotall, Nora's Conscience, Nekoshota, PineapplePansy, Ritter Runkel, SayruZ, scatterman, SGucciG, shawniepie, shoggi, Shudderfly, skip, Soleful Phoenix, Soviet_Cyber, Spart117MC, Striam, T The light Tank, Tar, Teddy, Thyrork, Uncle Sam, Useless Lesbian, Veo, Wicked_Rhyme, and Zapdude!

  • Thank you to all our contributors who generously gave us permission to use their fantastic work: you’ve helped make OWB what it is today.
Comments on the Steam page are purposefully disabled. For bug reports, suggestions and discussion, please join our Discord[discord.gg].