By which I mean to say that Kaiserreich: Legacy of the Weltkrieg, the extremely popular mod for Paradox Interactive’s World War 2 grand strategy game Hearts of Iron 4, has been updated for the game’s latest patch and is once again playable.įor the unacquainted, Kaiserreich is an alternate history total conversion mod that takes place in a world in which Germany is victorious in the First World War. On Sunday, April 19, 2019, Kaiser Wilhelm II returned from his long exile to reclaim his throne.