Metro: Last Light takes place in a post-apocalyptic world where a nuclear war has devastated Moscow, forcing survivors to seek refuge in the city's subway system. The game follows the story of Artyom, a young man who was hailed as a hero for stopping the threat of a mysterious race of creatures known as The Dark Ones. However, reports surface that one of these creatures may have survived and is now on the loose, leading Artyom to embark on a journey to uncover the truth.
The gameplay in Metro: Last Light is a mix of storytelling and action, with players encouraged to use stealth and strategy to overcome enemies. Bullets are scarce, making high-grade bullets the currency of the Metro, and players must carefully manage their ammunition. The game features both shooting and non-lethal takedowns, allowing players to choose their approach depending on the situation.
The game takes place in two environments: the Metro, a network of stations and tunnels infested with mutants, and the surface world above, which is filled with toxic hazards and dangers. Players must scavenge for supplies, including gas mask filters, to survive on the surface, as the mask will crack and break if not replaced regularly.