In Day R, players engage in turn-based survival mechanics, exploring a vast map of the USSR, scavenging for resources, and managing their health and hunger while facing various threats. The gameplay emphasizes strategic decision-making and resource management to ensure survival.

The storyline of Day R unfolds in 1985, where the USSR has been devastated by an unknown enemy, transforming the country into a radioactive wasteland filled with violence, hunger, and disease. Players must navigate this perilous environment while uncovering the mysteries of the catastrophe.

Day R stands out with its expansive map featuring thousands of locations to explore, as well as its cooperative online mode, allowing players to team up, communicate, and support each other in their survival efforts.