Download-hearts-of-iron-4-field-marshal-edition-v1-9-1-online -

To play online with others on this specific version, everyone in the lobby must have the same "checksum" (the version code). Right-click in your Steam library. Select Properties > Betas .

Click "Multiplayer" in the main menu. You can use the Steam "Invite Friend" feature or the Server Browser. To play online with others on this specific

If you’ve played newer versions, go to Documents/Paradox Interactive/Hearts of Iron IV and delete the shadercache folder to prevent crashes. To play online with others on this specific