Kaiserreich (mod)

Kaiserreich: Legacy of the Weltkrieg
Developer(s)The Kaiserreich Team
Platform(s)Linux, macOS, Windows
Release24 September 2018
Genre(s)Grand strategy wargame, alternate history

Kaiserreich: Legacy of the Weltkrieg is an alternate history mod for the grand strategy video game Hearts of Iron IV (2016). It is set in a fictionalized version of World War II, where the Central Powers won World War I. The setting of the mod is drastically different from the politics and borders present during the real World War II, with several nations impacted by civil wars and revolutions and the definitions of communism and fascism being altered.

Similarly to the base Hearts of Iron IV game, the player takes control of a nation during World War II and guides it through the conflict starting in 1936, with no major gameplay differences between the mod and the base game beyond the addition of content. The mod has been met with a positive response from critics, viewing its setting as surpassing that of the base game and allowing for more possibilities. Since release, the developers have created short films and merchandise based on the mod, with the former depicting events showcased in the mod's lore.