Hearts of Iron IV - Wikipedia

HoI4 Suggestion: Production

Open Beta & Game Assistance Hearts of Iron IV: By Blood Alone · Hearts of Iron IV update for 28 September 2022 · SteamDB

Hearts of Iron 4 multiplayer is under siege from hackers as Paradox investigates

Paradox Interactive Releases “Hearts of Iron IV”

TS Let's Plays Various Paradox Mods (Currently Playing:The Last Bastion of Liberty, The United States in TNO), Page 232

Next Hearts of Iron 4 update entirely overhauls Poland's focus tree

Lads on War - A UK HOI4 AAR

Paradox claims Hearts of Iron IV 'most moddable game yet

HoI4 Beta Screenshot accidentally posted in public forum : r/paradoxplaza

Division designer - Hearts of Iron 4 Wiki