The mod is widely celebrated for its "What if the Soviet Union won the Cold War?" scenario, where the USSR remains a global superpower into the 21st century while the United States has collapsed and fractured into multiple competing states. The Legacy of Red World
: Moving the extracted files into the game's local "mod" directory (usually found in Documents/Paradox Interactive/Hearts of Iron IV/mod ).
: Enabling the mod within the game's launcher before starting a new campaign. Return Of The Red World Mod - Hearts Of Iron 4
: A complete redesign of the technology tree to reflect the era of 2010 and beyond, including modern infantry equipment, tanks, and aircraft.