Kaiserreich (mod)

Kaiserreich: Legacy of the Weltkrieg
Steam Workshop icon
Developer(s)	The Kaiserreich Team
Platform(s)	Linux, macOS, Windows
Release	1 December 2016
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). Set in an alternate timeline where the Central Powers won World War I, the politics of Kaiserreich 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.