Paradox Interactive | Hearts of Iron IV: By Blood Alone - Official Announce Trailer @paradoxinteractive | Uploaded June 2022 | Updated October 2024, 8 hours ago.
Explore a variety of alternate histories in By Blood Alone, a new expansion for Hearts of Iron IV, Paradox Interactive's grand strategy wargame. New focus trees for Italy, Ethiopia and Switzerland open a number of possible paths. You'll also be able to design your own warplanes as you conquer the skies.

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