The world above has been transformed into a frozen, poisonous wasteland teeming with mutated creatures and lethal radiation. Humanity’s remnants have retreated into the Moscow underground, establishing fragile "Station-Cities" that are constantly under siege by both mutants and warring human factions like the and the Fourth Reich .
: After a Spartan Ranger named Hunter goes missing while investigating the threat, Artyom is tasked with a desperate mission: travel to the heart of the Metro—the great city-station Polis —to warn the leadership and seek help.
: Artyom follows through with the plan to launch ancient missiles to destroy the Dark Ones' home.
: The game features a "Moral Points" system—hidden choices made throughout the story that determine the final outcome.