In Atomic Heart after a a system failure at a soviet facility leads machines to rebel against humans. You take control of Major P-3 who is given the task to eliminate the consequences of the accident and prevent the leakage of classified information threatening to destroy the whole world. 

The game is set in an alternate history version of the Soviet Union, during the 1950s. 

Initially depicted as a retrofuturistic utopia, the game follows the quick collapse of the Soviet Union into a dystopia, after a robot uprising begins.